ci: install docs dependencies in release checks

Author: MichengLiang

.github/workflows/ci.yml

@@ -19,4 +19,6 @@ jobs:
           node-version: 24
           cache: pnpm
       - run: pnpm install --frozen-lockfile
+      - run: pnpm install --frozen-lockfile
+        working-directory: docs
       - run: pnpm check

.github/workflows/publish.yml

@@ -25,6 +25,8 @@ jobs:
           registry-url: https://registry.npmjs.org
           package-manager-cache: false
       - run: pnpm install --frozen-lockfile
+      - run: pnpm install --frozen-lockfile
+        working-directory: docs
       - run: pnpm check
       - name: Verify tag matches package version
         if: startsWith(github.ref, 'refs/tags/')