mkdocs.yml: add missing links for SQL commands for PLUGINS

mkdocs.yml

@@ -70,17 +70,20 @@ nav:
       - reference/ansi_sql.md
       - reference/legend.md
       - Команды:
+        - reference/sql/alter_plugin.md
         - reference/sql/alter_procedure.md
         - reference/sql/alter_system.md
         - reference/sql/alter_user.md
         - reference/sql/call.md
         - reference/sql/create_index.md
+        - reference/sql/create_plugin.md
         - reference/sql/create_procedure.md
         - reference/sql/create_role.md
         - reference/sql/create_table.md
         - reference/sql/create_user.md
         - reference/sql/delete.md
         - reference/sql/drop_index.md
+        - reference/sql/drop_plugin.md
         - reference/sql/drop_procedure.md
         - reference/sql/drop_role.md
         - reference/sql/drop_table.md