Enable cache on vendor assets.

Author: GirlBossRush

.github/workflows/ci.yaml

@@ -112,8 +112,10 @@ jobs:
         id: cache-yarn
         uses: actions/cache@v2
         with:
-          path: "**/node_modules"
-          key: yarn-build-${{ hashFiles('**/yarn.lock') }}
+          path: |
+            "**/vendor/modules"
+            "**/node_modules"
+          key: yarn-build-${{ hashFiles('**/yarn.lock') }}-${{ hashFiles('**/vendor/yarn.lock') }}
           restore-keys: |
             yarn-build-