Add node version in build-extension-charts.yml

Signed-off-by: Francesco Torchia <[email protected]>

.github/workflows/build-extension-charts.yml

@@ -49,6 +49,7 @@ jobs:
         uses: actions/setup-node@v4
         with:
           cache: yarn
+          node-version-file: '.nvmrc'
 
       - name: Setup yarn
         run: npm install -g yarn