CI: Only deploy on master or tag

Author: jonnor

.github/workflows/build.yaml

@@ -56,9 +56,10 @@ jobs:
         path: emlearn-micropython-*.zip
 
     - name: Deploy to Github Pages
+      if: "github.ref_name == 'master' || github.ref_type == 'tag'"
       uses: peaceiris/actions-gh-pages@v3
       with:
         github_token: ${{ secrets.GITHUB_TOKEN }}
         publish_dir: ./dist
         keep_files: true
-        destination_dir: builds/0.3.0/
+        destination_dir: builds/${{ github.ref_name }}