Upgrade to reusable spring-io/spring-github-workflows@v3

Apparently Dependabot can upgrade reusable GHA workflows as well.
So less burden on support and less stress from changes in those reusable workflows in `main`

**Auto-cherry-pick to `3.1.x`**

.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@main
+    uses: spring-io/spring-github-workflows/.github/workflows/spring-cherry-pick.yml@v3
     secrets:
       GH_ACTIONS_REPO_TOKEN: ${{ secrets.GH_ACTIONS_REPO_TOKEN }}

.github/workflows/backport-issue.yml

@@ -7,6 +7,6 @@ on:
 
 jobs:
   backport-issue:
-    uses: spring-io/spring-github-workflows/.github/workflows/spring-backport-issue.yml@main
+    uses: spring-io/spring-github-workflows/.github/workflows/spring-backport-issue.yml@v3
     secrets:
       GH_ACTIONS_REPO_TOKEN: ${{ secrets.GH_ACTIONS_REPO_TOKEN }}

.github/workflows/ci-snapshot.yml

@@ -17,7 +17,7 @@ concurrency:
 
 jobs:
   build-snapshot:
-    uses: spring-io/spring-github-workflows/.github/workflows/spring-artifactory-gradle-snapshot.yml@main
+    uses: spring-io/spring-github-workflows/.github/workflows/spring-artifactory-gradle-snapshot.yml@v3
     with:
       gradleTasks: ${{ github.event_name == 'schedule' && '--rerun-tasks' || '' }}
     secrets:

.github/workflows/deploy-docs.yml

@@ -16,4 +16,4 @@ permissions:
 jobs:
   dispatch-docs-build:
     if: github.repository_owner == 'spring-projects'
-    uses: spring-io/spring-github-workflows/.github/workflows/spring-dispatch-docs-build.yml@main
+    uses: spring-io/spring-github-workflows/.github/workflows/spring-dispatch-docs-build.yml@v3

.github/workflows/merge-dependabot-pr.yml

@@ -12,6 +12,6 @@ jobs:
   merge-dependabot-pr:
     permissions: write-all
 
-    uses: spring-io/spring-github-workflows/.github/workflows/spring-merge-dependabot-pr.yml@main
+    uses: spring-io/spring-github-workflows/.github/workflows/spring-merge-dependabot-pr.yml@v3
     with:
       mergeArguments: --auto --squash

.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@main
+    uses: spring-io/spring-github-workflows/.github/workflows/spring-gradle-pull-request-build.yml@v3

.github/workflows/release.yml

@@ -12,7 +12,7 @@ jobs:
       contents: write
       issues: write
 
-    uses: spring-io/spring-github-workflows/.github/workflows/spring-artifactory-gradle-release.yml@main
+    uses: spring-io/spring-github-workflows/.github/workflows/spring-artifactory-gradle-release.yml@v3
     secrets:
       GH_ACTIONS_REPO_TOKEN: ${{ secrets.GH_ACTIONS_REPO_TOKEN }}
       GRADLE_ENTERPRISE_SECRET_ACCESS_KEY: ${{ secrets.GRADLE_ENTERPRISE_SECRET_ACCESS_KEY }}