chore: enable github action auto update in dependabot.yml

.github/dependabot.yml

@@ -0,0 +1,7 @@
+version: 2
+updates:
+    # Adding new check for github-actions
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+        interval: "weekly"

webpack.dev.config.js

@@ -2,9 +2,7 @@ const path = require('path');
 const { createConfig } = require('@openedx/frontend-build');
 
 module.exports = createConfig('webpack-dev', {
-  entry: {
-    app: path.resolve(__dirname, 'example'),
-  },
+  entry: path.resolve(__dirname, 'example'),
   output: {
     path: path.resolve(__dirname, 'example/dist'),
     publicPath: '/',