build: update github actions

.github/workflows/ci.yaml

@@ -11,11 +11,13 @@ jobs:
         name: unit tests
         runs-on: ubuntu-latest
         steps:
-            - uses: actions/checkout@v3
-            - uses: actions/setup-node@v3
+            - uses: actions/checkout@v4
+            - uses: actions/setup-node@v4
               with:
                   node-version: '16'
                   cache: 'yarn'
+            - name: install yarn
+              run: npm install -g yarn@3.6.1
             - name: install dependencies
               run: yarn --frozen-lockfile
             - name: run unit tests