build(deps): update peter-evans/create-pull-request action to v5 [skip ci] (#578)

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/auto-update-keptn-spec.yml

@@ -26,7 +26,7 @@ jobs:
           echo "shkeptnspecversion: '$SPEC_TAG'" > ./config/config.yaml
 
       - name: Create Pull Request
-        uses: peter-evans/create-pull-request@v4.2.4
+        uses: peter-evans/create-pull-request@v5.0.2
         with:
           token: ${{ secrets.KEPTN_BOT_TOKEN }}
           commit-message: "Update keptn/spec to release ${{ env.SPEC_TAG }}"