Bump actions/cache.

Author: juraj-kirchheim-byborg

.github/workflows/ci.yml

@@ -39,7 +39,7 @@ jobs:
       run: echo "::set-output name=dir::$(yarn cache dir)"
 
     - name: Cache Yarn
-      uses: actions/cache@v1
+      uses: actions/cache@v4
       with:
         path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
         key: ${{ runner.os }}-yarn-${{ hashFiles('**/yarn.lock') }}