ci: update README.md in `pack-and-deploy` action

NO_DOC=ci
NO_TEST=ci
NO_CHANGELOG=ci

(cherry picked from commit e5e14cd6)

.github/actions/pack-and-deploy/README.md

@@ -6,6 +6,5 @@ Action packs and deploys Tarantool packages.
 
 Add the following code to the running steps after checkout done:
 ```
-  - uses: ./.github/actions/pack_and_deploy
+  - uses: ./.github/actions/pack-and-deploy
 ```
-