CI: Use npm i --legacy-peer-deps for react-virtualized

.github/workflows/ci.yml

@@ -49,7 +49,9 @@ jobs:
         
       - name: Install Node modules
         if: steps.node-cache.outputs.cache-hit != 'true'
-        run: npm install
+        # --legacy-peer-deps is necessary for current React versions until react-virtualized is
+        # updated or we replace it: https://github.com/bvaughn/react-virtualized/issues/1775
+        run: npm install --legacy-peer-deps
         
       - name: Build Zotero
         run: npm run build