workflows: bump peter-evans/create-pull-request from 5 to 6

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](peter-evans/create-pull-request@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] <[email protected]>

.github/workflows/staging-release.yaml

@@ -921,7 +921,7 @@ jobs:
 
       - name: Raise docs PR
         id: cpr
-        uses: peter-evans/create-pull-request@v5
+        uses: peter-evans/create-pull-request@v6
         with:
           commit-message: 'release: update to v${{ inputs.version }}'
           signoff: true
@@ -985,7 +985,7 @@ jobs:
 
       - name: Raise FB PR to update version
         id: cpr
-        uses: peter-evans/create-pull-request@v5
+        uses: peter-evans/create-pull-request@v6
         with:
           commit-message: 'release: update to ${{ steps.semvers.outputs.patch }}'
           signoff: true