fix: correct image optimization workflow permissions and token input

- Change `githubToken` to `GITHUB_TOKEN` (correct input name)
- Add `contents: write` and `pull-requests: write` permissions

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Codestz

.github/workflows/optimize-images.yml

@@ -8,6 +8,10 @@ on:
       - '**.webp'
       - '**.avif'
 
+permissions:
+  contents: write
+  pull-requests: write
+
 jobs:
   build:
     name: Compress Images
@@ -18,7 +22,7 @@ jobs:
       - name: Compress Images
         uses: calibreapp/image-actions@main
         with:
-          githubToken: ${{ secrets.GITHUB_TOKEN }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           jpegQuality: '80'
           pngQuality: '80'
           webpQuality: '80'