fixup! ci: prevent accidental merge of fixup! commits

.github/workflows/check-commit.yaml

@@ -12,4 +12,4 @@ jobs:
           ref: ${{ github.ref }}
           fetch-depth: 0
       - name: Check for fixup! commits
-        run: git log origin/main..HEAD | grep -ie '^     fixup!' && exit 1 || true
+        run: git log main..HEAD | grep -ie '^     fixup!' && exit 1 || true