Update yarn-install.yml

.github/workflows/yarn-install.yml

@@ -13,6 +13,7 @@ jobs:
       - uses: actions/checkout@v4.1.7
         with:
           persist-credentials: false # Required to make github pages deployment work correctly
+          node-version: 20.x
 
       - name: Cache Data # Cache SourceCred Data, invalidating if any of the config changes or the SC version is updated
         uses: actions/cache@v4.0.2