chore(adc): install dependencies before publishing

Otherwise we can't find the AWS SDK dependencies that we need.

Author: rix0rrr

.github/workflows/integ.yml

@@ -46,6 +46,10 @@ export class AdcPublishing extends Component {
             'node-version': 'lts/*',
           },
         },
+        {
+          name: 'Install dependencies',
+          run: 'yarn install --check-files --frozen-lockfile',
+        },
         {
           name: 'Download build artifacts',
           uses: 'actions/download-artifact@v4',