Rename webpack example to demo

It has grown significantly. I plan to add more minimal demos for Webpack
and probably some other bundlers.

examples/demo/package.json

@@ -1,12 +1,12 @@
 {
-  "name": "webpack-example",
+  "name": "demo",
   "version": "1.0.0",
   "private": true,
   "scripts": {
     "start": "webpack serve --open --mode development",
     "build": "webpack --mode production"
   },
-  "devDependencies": {
+  "dependencies": {
     "@fortawesome/fontawesome-free": "^5.15.4",
     "css-loader": "^6.2.0",
     "css-minimizer-webpack-plugin": "^3.0.2",

netlify.toml

@@ -1,3 +1,3 @@
 [build]
-publish = 'examples/webpack/dist/'
+publish = 'examples/demo/dist/'
-command = 'npm ci && npm run prepack && npm --workspace webpack-example run build'
+command = 'npm ci && npm run prepack && npm --workspace demo run build'