fix: explicitly install lunux-x86-gnu version of rollup

Building on an arm64 Mac, we were running into this issue:

npm/cli#4828

...whereby our package-lock only specified the arm64 version of this
dependency, so we explicitly install it here.

Author: fspeirs

.github/workflows/ci.yml

@@ -50,6 +50,10 @@ jobs:
           NPM_AUTH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         uses: ./.github/actions/install-dependencies
 
+      - name: Explicitly install Rollup linux binaries
+        if: ${{ steps.filter.outputs.any-workspace == 'true' }}
+        run: npm install @rollup/rollup-linux-x64-gnu --no-save --ignore-scripts
+
       - name: Build packages
         if: ${{ steps.filter.outputs.any-workspace == 'true' }}
         run: npm run build