update pull request action t master branch

the alpine base image of the previous action now does not
allow install with pip unless it is in a venv

Signed-off-by: vsoch <[email protected]>

Author: vsoch

.github/workflows/update-contributors.yaml

@@ -64,7 +64,7 @@ jobs:
         echo "PULL_REQUEST_BODY=Tributors update automated pull request." >> $GITHUB_ENV
 
     - name: Open Pull Request
-      uses: vsoch/pull-request-action@d703f40f3af5ae294f9816395ddf2e3d2d3feafa # 1.0.21
+      uses: vsoch/pull-request-action@master
       if: ${{ env.OPEN_PULL_REQUEST == '1' }}
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}