ci: switch to bun

This commit changes the CI setup from Node.js to Bun.

Bun is a new JavaScript runtime that is faster and more efficient than Node.js. It is also more secure and has a smaller footprint.

This change will improve the performance and security of the CI pipeline.

.github/workflows/github-pages.yaml

@@ -16,16 +16,16 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
 
-      - name: Set up Node.js
-        uses: actions/setup-node@v4
+      - name: Set up Bun
+        uses: oven-sh/setup-bun@v2
         with:
-          node-version: '20'
+          bun-version: latest
 
       - name: Install dependencies
-        run: npm install
+        run: bun install
 
       - name: Build the project
-        run: npm run build
+        run: bun run build
 
       - name: Deploy to GitHub Pages
         uses: peaceiris/actions-gh-pages@v4