fix: update OSPO action references to canonical org path

The OSPO actions have moved from github/ to github-community-projects/.
Update workflow references to use the canonical org path.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: zkoppert

.github/workflows/issue-metrics.yml

@@ -34,7 +34,7 @@ jobs:
           last_day=${{ inputs.report_date_end }} >> "$GITHUB_ENV"
 
       - name: Run issue-metrics tool
-        uses: github/issue-metrics@v2
+        uses: github-community-projects/issue-metrics@v2
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           SEARCH_QUERY: 'repo:awsdocs/aws-doc-sdk-examples created:${{ env.first_day }}..${{ env.last_day }}'