added body to PR

Author: wtripp180901

.github/workflows/update-timestamps.yml

@@ -125,6 +125,6 @@ jobs:
 
       - name: Create PR
         if: steps.pr-check.outputs.pr_exists
-        run: gh pr create --title "[Auto] Bump repo timestamps to latest" --base main --head auto/bump-timestamps
+        run: gh pr create --title "[Auto] Bump repo timestamps to latest" --base main --head auto/bump-timestamps --body "Updated Release Train timestamps in defaults.yml with latest from Ark"
         env:
           GH_TOKEN: ${{ github.token }}