ci: use git url

Author: carsakiller

.github/workflows/pull_request.yml

@@ -58,7 +58,7 @@ jobs:
         run: |
           BASE_REF="${{ github.event.pull_request.base.sha }}"
           HEAD_REF="${{ github.event.pull_request.head.sha }}"
-          HEAD_REMOTE="${{github.event.pull_request.head.repo}}"
+          HEAD_REMOTE="${{github.event.pull_request.head.repo.git_url}}"
 
           echo "BASE_REF=$BASE_REF" >> $GITHUB_ENV
           echo "HEAD_REF=$HEAD_REF" >> $GITHUB_ENV