Fix branch name.

Author: khatchad

.github/workflows/continuous-integration.yml

@@ -55,4 +55,4 @@ jobs:
       env:
         GITHUB_USERNAME: ${{ secrets.GITHUB_USERNAME }}
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      if: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' }}
+      if: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}