Update build_docs.yml

main to master again

Author: bwheelz36

.github/workflows/build_docs.yml

@@ -38,7 +38,7 @@ jobs:
           make github
       - name: Deploy
         uses: peaceiris/actions-gh-pages@v3
-        if: ${{ github.ref == 'refs/heads/main' }}
+        if: ${{ github.ref == 'refs/heads/master' }}
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: ./docs