.github: print date of today in the PR title

Let's add date of today in the PR title, to avoid confusion when
seeing the same title for multiple different weekly update PRs.

sdk_container/src/third_party/portage-stable/.github/workflows/update-packages-from-list.yml

@@ -62,17 +62,19 @@ jobs:
               updated=1
               count=$(git -C portage-stable rev-list --count "${old_head}..${new_head}")
           fi
+          todaydate=$(date +%Y-%m-%d)
           echo "UPDATED=${updated}" >>"${GITHUB_OUTPUT}"
           echo "COUNT=${count}" >>"${GITHUB_OUTPUT}"
+          echo "TODAYDATE=${todaydate}" >>"${GITHUB_OUTPUT}"
       - name: Create pull request for main branch
         uses: peter-evans/create-pull-request@v4
         if: steps.update-listed-packages.outputs.UPDATED == 1
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
           path: portage-stable
-          branch: buildbot/automatic-package-updates
+          branch: buildbot/weekly-package-updates-${{steps.update-listed-packages.outputs.TODAYDATE }}
           delete-branch: true
           base: main
-          title: Weekly package updates
+          title: Weekly package updates ${{steps.update-listed-packages.outputs.TODAYDATE }}
           body: Updated ${{steps.update-listed-packages.outputs.COUNT }} package(s).
           labels: main