Update GitHub Actions to use latest versions v4

Signed-off-by: Trade Control <admin@tradecontrol.co.uk>

Author: TradeControl

.github/workflows/deploy.yml

@@ -27,7 +27,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Install, build, and upload your site output
-        uses: withastro/action@v2
+        uses: withastro/action@v4
 
         # with:
             # path: . # The root location of your Astro project inside the repository. (optional)
@@ -43,4 +43,4 @@ jobs:
     steps:
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v1
+        uses: actions/deploy-pages@v4