Use main for reusable workflows

(cherry picked from commit c67273e)

Author: artembilan

.github/workflows/auto-cherry-pick.yml

@@ -8,6 +8,6 @@ on:
 
 jobs:
   cherry-pick-commit:
-    uses: spring-io/spring-github-workflows/.github/workflows/spring-cherry-pick.yml@v7
+    uses: spring-io/spring-github-workflows/.github/workflows/spring-cherry-pick.yml@main
     secrets:
-      GH_ACTIONS_REPO_TOKEN: ${{ secrets.GH_ACTIONS_REPO_TOKEN }}
+      GH_ACTIONS_REPO_TOKEN: ${{ secrets.GH_ACTIONS_REPO_TOKEN }}

.github/workflows/pr-build.yml

@@ -8,4 +8,4 @@ on:
 
 jobs:
   build-pull-request:
-    uses: spring-io/spring-github-workflows/.github/workflows/spring-gradle-pull-request-build.yml@v7
+    uses: spring-io/spring-github-workflows/.github/workflows/spring-gradle-pull-request-build.yml@main