ci: Update and refactor GitHub Actions workflows

Author: attajak

.github/workflows/deploy.yml

@@ -38,7 +38,7 @@ jobs:
           submodules: true  # Fetch Hugo themes (true OR recursive)
           fetch-depth: 0    # Fetch all history for .GitInfo and .Lastmod
       - name: Install Dart-Sass
-        run: sudo snap install dart-sass
+        uses: dw-labs-org/dart-sass-gha@v1
       - name: Setup Hugo
         uses: peaceiris/actions-hugo@v3
         with:

.github/workflows/update-theme.yml

@@ -3,14 +3,13 @@ name: Update theme
 # Controls when the workflow will run
 on:
   schedule:
-    # Update theme automatically everyday at 00:00 UTC
-    - cron: '0 0 * * *'
+    # Update theme automatically every week at 00:00 on Sunday
+    - cron: '0 0 * * 0'
   # Allows you to run this workflow manually from the Actions tab
   workflow_dispatch:
 
 permissions:
   contents: write
-  id-token: write
 
 jobs:
   Update-FixIt-bundle: