Fix build badge link

Author: hbcarlos

README.md

@@ -1,6 +1,6 @@
 # jupyterlab_blockly
 
-[![Github Actions Status](https://github.com/quantstack/jupyterlab-blockly/workflows/Build/badge.svg)](https://github.com/quantstack/jupyterlab-blockly/actions/workflows/build.yml)[![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/quantstack/jupyterlab-blockly/main?urlpath=lab)
+[![Github Actions Status](https://github.com/QuantStack/jupyterlab-blockly/actions/workflows/build.yml/badge.svg)](https://github.com/quantstack/jupyterlab-blockly/actions/workflows/build.yml)[![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/quantstack/jupyterlab-blockly/main?urlpath=lab)
 
 Blockly extension for JupyterLab.