Bump spring-io/spring-github-workflows (#10476)

Bumps the development-dependencies group with 1 update: [spring-io/spring-github-workflows](https://github.com/spring-io/spring-github-workflows).


Updates `spring-io/spring-github-workflows` from 5 to 6
- [Release notes](https://github.com/spring-io/spring-github-workflows/releases)
- [Commits](spring-io/spring-github-workflows@v5...v6)

---
updated-dependencies:
- dependency-name: spring-io/spring-github-workflows
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: development-dependencies
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/announce-milestone-planning.yml

@@ -6,6 +6,6 @@ on:
 
 jobs:
   announce-milestone-planning:
-    uses: spring-io/spring-github-workflows/.github/workflows/spring-announce-milestone-planning.yml@v5
+    uses: spring-io/spring-github-workflows/.github/workflows/spring-announce-milestone-planning.yml@v6
     secrets:
       SPRING_RELEASE_CHAT_WEBHOOK_URL: ${{ secrets.SPRING_RELEASE_GCHAT_WEBHOOK_URL }}

.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@v5
+    uses: spring-io/spring-github-workflows/.github/workflows/spring-cherry-pick.yml@v6
     secrets:
       GH_ACTIONS_REPO_TOKEN: ${{ secrets.GH_ACTIONS_REPO_TOKEN }}

.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@v5
+    uses: spring-io/spring-github-workflows/.github/workflows/spring-dispatch-docs-build.yml@v6