ci: add yarn prepare step to build-web job before exporting web example

Author: mCodex

.github/workflows/ci.yml

@@ -67,6 +67,9 @@ jobs:
       - name: Setup
         uses: ./.github/actions/setup
 
+      - name: Build library bundle
+        run: yarn prepare
+
       - name: Build example for Web
         run: |
           yarn example expo export --platform web