Update required dependency (#297)

Author: karthiknadig

.github/actions/build-vsix/action.yml

@@ -62,7 +62,7 @@ runs:
       shell: bash
 
     - name: Upload VSIX
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v4
       with:
         name: formatter-package
         path: |