Bump peter-evans/create-pull-request from 5 to 6 (#19407)

Bumps [peter-evans/create-pull-request](https://github.com/peter-evans/create-pull-request) from 5 to 6.
- [Release notes](https://github.com/peter-evans/create-pull-request/releases)
- [Commits](https://github.com/peter-evans/create-pull-request/compare/v5...v6)

---
updated-dependencies:
- dependency-name: peter-evans/create-pull-request
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

.github/workflows/_legacy-checkpoints.yml

@@ -138,7 +138,7 @@ jobs:
         run: echo ${PL_VERSION} >> back-compatible-versions.txt
 
       - name: Create Pull Request
-        uses: peter-evans/create-pull-request@v5
+        uses: peter-evans/create-pull-request@v6
         with:
           title: Adding test for legacy checkpoint created with ${{ env.PL_VERSION }}
           committer: GitHub <noreply@github.com>

.github/workflows/docs-tutorials.yml

@@ -48,7 +48,7 @@ jobs:
 
       - name: Create Pull Request
         if: ${{ github.event_name != 'pull_request' && env.SHA_ACTUAL != env.SHA_LATEST }}
-        uses: peter-evans/create-pull-request@v5
+        uses: peter-evans/create-pull-request@v6
         with:
           title: "docs: update ref to latest tutorials"
           committer: GitHub <noreply@github.com>

.github/workflows/release-pkg.yml

@@ -103,7 +103,7 @@ jobs:
 
       - name: Create Pull Request
         if: github.event_name != 'pull_request'
-        uses: peter-evans/create-pull-request@v5
+        uses: peter-evans/create-pull-request@v6
         with:
           title: "Bump lightning ver `${{ env.TAG }}`"
           committer: GitHub <noreply@github.com>