GIT: workflows - no log in for PRs

Signed-off-by: jokob-sk <jokob.sk@gmail.com>

.github/workflows/docker_dev.yml

@@ -86,6 +86,7 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Login GHCR (jokob-sk legacy)
+        if: github.event_name != 'pull_request'
         uses: docker/login-action@v3
         with:
           registry: ghcr.io