ci: followup fix RPM package builds on aarch64 runners

Commit 715abaaf ("ci: fix RPM package builds on aarch64 runners")
has limited number of parallel jobs to 6 on these runners to fix the
OOM, but it turns out this isn't enough: almalinux_9_aarch64 workflow
fails constantly even with this setting. Let's try to reduce the amount
of jobs to 4.

NO_CHANGELOG=ci
NO_TEST=ci
NO_DOC=ci

.github/workflows/almalinux_9_aarch64.yml

@@ -58,8 +58,8 @@ jobs:
           # We're using LXD containers as aarch64 runners. For some reason, OOM
           # killer just kills the compilation process when `make -j $(nproc)`.
           # The issue happens only with builds where LTO is enabled. It's found,
-          # that `-j6` works fine. The bigger value causes problems.
-          SMPFLAGS: '-j6'
+          # that `-j4` works fine. The bigger value causes problems.
+          SMPFLAGS: '-j4'
         uses: ./.github/actions/pack-and-deploy
       - name: Send VK Teams message on failure
         if: failure()

.github/workflows/fedora_34_aarch64.yml

@@ -58,8 +58,8 @@ jobs:
           # We're using LXD containers as aarch64 runners. For some reason, OOM
           # killer just kills the compilation process when `make -j $(nproc)`.
           # The issue happens only with builds where LTO is enabled. It's found,
-          # that `-j6` works fine. The bigger value causes problems.
-          SMPFLAGS: '-j6'
+          # that `-j4` works fine. The bigger value causes problems.
+          SMPFLAGS: '-j4'
         uses: ./.github/actions/pack-and-deploy
       - name: Send VK Teams message on failure
         if: failure()

.github/workflows/fedora_35_aarch64.yml

@@ -58,8 +58,8 @@ jobs:
           # We're using LXD containers as aarch64 runners. For some reason, OOM
           # killer just kills the compilation process when `make -j $(nproc)`.
           # The issue happens only with builds where LTO is enabled. It's found,
-          # that `-j6` works fine. The bigger value causes problems.
-          SMPFLAGS: '-j6'
+          # that `-j4` works fine. The bigger value causes problems.
+          SMPFLAGS: '-j4'
         uses: ./.github/actions/pack-and-deploy
       - name: Send VK Teams message on failure
         if: failure()

.github/workflows/fedora_36_aarch64.yml

@@ -58,8 +58,8 @@ jobs:
           # We're using LXD containers as aarch64 runners. For some reason, OOM
           # killer just kills the compilation process when `make -j $(nproc)`.
           # The issue happens only with builds where LTO is enabled. It's found,
-          # that `-j6` works fine. The bigger value causes problems.
-          SMPFLAGS: '-j6'
+          # that `-j4` works fine. The bigger value causes problems.
+          SMPFLAGS: '-j4'
         uses: ./.github/actions/pack-and-deploy
       - name: Send VK Teams message on failure
         if: failure()

.github/workflows/fedora_37_aarch64.yml

@@ -58,8 +58,8 @@ jobs:
           # We're using LXD containers as aarch64 runners. For some reason, OOM
           # killer just kills the compilation process when `make -j $(nproc)`.
           # The issue happens only with builds where LTO is enabled. It's found,
-          # that `-j6` works fine. The bigger value causes problems.
-          SMPFLAGS: '-j6'
+          # that `-j4` works fine. The bigger value causes problems.
+          SMPFLAGS: '-j4'
         uses: ./.github/actions/pack-and-deploy
       - name: Send VK Teams message on failure
         if: failure()

.github/workflows/fedora_38_aarch64.yml

@@ -58,8 +58,8 @@ jobs:
           # We're using LXD containers as aarch64 runners. For some reason, OOM
           # killer just kills the compilation process when `make -j $(nproc)`.
           # The issue happens only with builds where LTO is enabled. It's found,
-          # that `-j6` works fine. The bigger value causes problems.
-          SMPFLAGS: '-j6'
+          # that `-j4` works fine. The bigger value causes problems.
+          SMPFLAGS: '-j4'
         uses: ./.github/actions/pack-and-deploy
       - name: Send VK Teams message on failure
         if: failure()

.github/workflows/fedora_39_aarch64.yml

@@ -58,8 +58,8 @@ jobs:
           # We're using LXD containers as aarch64 runners. For some reason, OOM
           # killer just kills the compilation process when `make -j $(nproc)`.
           # The issue happens only with builds where LTO is enabled. It's found,
-          # that `-j6` works fine. The bigger value causes problems.
-          SMPFLAGS: '-j6'
+          # that `-j4` works fine. The bigger value causes problems.
+          SMPFLAGS: '-j4'
         uses: ./.github/actions/pack-and-deploy
       - name: Send VK Teams message on failure
         if: failure()

.github/workflows/ubuntu_22_04_aarch64.yml

@@ -58,8 +58,8 @@ jobs:
           # We're using LXD containers as aarch64 runners. For some reason, OOM
           # killer just kills the compilation process when `make -j $(nproc)`.
           # The issue happens only with builds where LTO is enabled. It's found,
-          # that `-j6` works fine. The bigger value causes problems.
-          SMPFLAGS: '-j6'
+          # that `-j4` works fine. The bigger value causes problems.
+          SMPFLAGS: '-j4'
         uses: ./.github/actions/pack-and-deploy
       - name: Send VK Teams message on failure
         if: failure()