ci: fix target branch name usage (#938)

Author: jirikuncar

.github/workflows/test.yml

@@ -44,16 +44,21 @@ jobs:
         name: Run pre-commit
         if: github.event.action != 'closed' && github.event.pull_request.merged != true
         run: |
-          pre-commit run --from-ref ${{ github.event.pull_request.base.sha }} --to-ref ${{ github.event.pull_request.head.sha }} --show-diff-on-failure --color=always
+          pre-commit run --from-ref "${FROM_REF}" --to-ref "${TO_REF}" --show-diff-on-failure --color=always
+        env:
+          FROM_REF: ${{ github.event.pull_request.base.sha }}
+          TO_REF: ${{ github.event.pull_request.head.sha }}
       - name: Commit changes
         if: ${{ failure() }}
         run: |-
           git add -A
           git config user.name "${GIT_AUTHOR_NAME}"
           git config user.email "${GIT_AUTHOR_EMAIL}"
           git commit -m "pre-commit fixes"
-          git push origin HEAD:${{ github.event.pull_request.head.ref }}
+          git push origin "HEAD:${HEAD_REF}"
           exit 1
+        env:
+          HEAD_REF: ${{ github.event.pull_request.head.ref }}
 
   test:
     strategy: