ci: don't set a user email for RSS commit author

Author: plowsof

.github/workflows/build-docker.yml

@@ -192,7 +192,6 @@ jobs:
       - name: Add to RSS feed
         if: github.ref_type == 'tag'
         run: |
-          git config --local user.email "torrent@users.noreply.github.com"
           git config --local user.name "updateRSS"
           git fetch origin "${GITHUB_REF_NAME}"
           git checkout "${GITHUB_REF_NAME}"