Fix CI env var name

Author: VaiTon

.github/workflows/hugo.yml

@@ -30,7 +30,7 @@ jobs:
     runs-on: ubuntu-latest
     env:
       HUGO_VERSION: 0.145.0
-      HUGO_CACHE_DIR: /tmp/hugo_cache
+      HUGO_CACHEDIR: /tmp/hugo_cache
       HUGO_ENVIRONMENT: production
     steps:
       - name: Setup hugo
@@ -49,8 +49,8 @@ jobs:
       - name: Setup hugo cache
         uses: actions/cache@v4
         with:
-          path: ${{ env.HUGO_CACHEDIR }}
-          key: ${{ runner.os }}-hugomod-${{ hashFiles('**/config.toml') }}
+          path: "${{ env.HUGO_CACHEDIR }}"
+          key: ${{ runner.os }}-hugomod-${{ hashFiles('config.toml') }}
           restore-keys: |
             ${{ runner.os }}-hugomod-
 
@@ -66,7 +66,7 @@ jobs:
       - name: Build with Hugo
         env:
           # For maximum backward compatibility with Hugo modules
-          HUGO_CACHEDIR: ${{ env.HUGO_CACHE_DIR }}
+          HUGO_CACHEDIR: ${{ env.HUGO_CACHEDIR }}
           HUGO_ENVIRONMENT: ${{ env.HUGO_ENVIRONMENT }}
         run: |
           hugo \