chore: cache-assets (#29487)

Author: MohamedH1998

.github/workflows/ci.yml

@@ -122,7 +122,9 @@ jobs:
         with:
           path: |
             node_modules/.astro/assets
-          key: static
+          key: astro-assets-${{ hashFiles('src/assets/**') }}
+          restore-keys: |
+            astro-assets-
 
       # The starlight-links-validator plugin runs in astro:build:done, which fires
       # AFTER all pages have been written to dist/. If link validation fails, the