fix: update OSPO action references to canonical org path (#77)

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/contributors.yml

@@ -13,4 +13,4 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Contributors Action
-        uses: github/contributors@v1.5.8
+        uses: github-community-projects/contributors@v1.5.8