fix reference to main branch

Author: satra

.github/workflows/build_deploy.yml

@@ -37,7 +37,7 @@ jobs:
 
     - name: Deploy 🚀
       uses: JamesIves/github-pages-deploy-action@v4
-      if: github.ref == 'refs/heads/master'
+      if: github.ref == 'refs/heads/main'
       with:
         ACCESS_TOKEN: ${{ secrets.ACCESS_TOKEN }}
         BRANCH: gh-pages # The branch the action should deploy to.