Cache _freeze correctly (#546)

Author: penelopeysm

.github/workflows/preview.yml

@@ -58,7 +58,7 @@ jobs:
         with:
           path: |
             ./_freeze/
-          key: ${{ runner.os }}-${{ hashFiles('**/Manifest.toml') }}
+          key: ${{ runner.os }}-${{ hashFiles('**/Manifest.toml') }}-${{ hashFiles('**/index.qmd') }}
 
       - name: Deploy to GitHub Pages
         uses: JamesIves/github-pages-deploy-action@v4

.github/workflows/publish.yml

@@ -90,7 +90,7 @@ jobs:
         with:
           path: |
             ./_freeze/
-          key: ${{ runner.os }}-${{ hashFiles('**/Manifest.toml') }}
+          key: ${{ runner.os }}-${{ hashFiles('**/Manifest.toml') }}-${{ hashFiles('**/index.qmd') }}
 
       - name: Fetch search_original.json from main site
         run: curl -O https://raw.githubusercontent.com/TuringLang/turinglang.github.io/gh-pages/search_original.json