Update .github/workflows/build.yml

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

.github/workflows/build.yml

@@ -19,8 +19,18 @@ jobs:
           submodules: recursive
           fetch-depth: 0
       
+      - name: Cache Hugo modules
+        uses: actions/cache@v3
+        with:
+          path: .hugo
+          key: ${{ runner.os }}-hugo-${{ steps.hugo-version.outputs.version }}-${{ hashFiles('**/go.mod') }}
+          restore-keys: |
+            ${{ runner.os }}-hugo-${{ steps.hugo-version.outputs.version }}
+            ${{ runner.os }}-hugo-
+      
       - name: Setup Hugo
         uses: peaceiris/actions-hugo@v3
+        id: hugo-version
         with:
           hugo-version: 'latest'
           extended: true