fix: add vale check dependency (#355)

Author: adkah

.github/workflows/run-checks.yml

@@ -26,6 +26,10 @@ jobs:
 
     steps:
       - uses: actions/checkout@v5
+      - uses: pnpm/[email protected]
+        with:
+          version: 8.6.2
+      - run: pnpm install -g mdx2vast
       - uses: errata-ai/[email protected]
         with:
           filter_mode: added