ci: update Django Tests workflow

.github/workflows/pr-django-tests.yml

@@ -11,9 +11,9 @@ jobs:
     strategy:
       matrix:
         os:
-          - ubuntu-20.04
+          - ubuntu-latest
         node-version:
-          - '16'
+          - 'lts/*'
         leia-tests:
           - django-example
     steps:
@@ -22,20 +22,12 @@ jobs:
       # Eventually it would be great if these steps could live in a separate YAML file
       # that could be included in line to avoid code duplication
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Install node ${{ matrix.node-version }}
-        uses: actions/setup-node@v2
+        uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node-version }}
-      - name: Get Yarn cache directory
-        id: yarn-cache-dir-path
-        run: echo "::set-output name=dir::$(yarn cache dir)"
-      - name: Use Yarn cache
-        uses: actions/cache@v2
-        id: yarn-cache
-        with:
-          path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
-          key: ${{ runner.os }}-yarn-${{ matrix.node-version }}-${{ hashFiles('**/yarn.lock') }}
+          cache: yarn
       - name: Install Yarn dependencies
         run: yarn install --prefer-offline --frozen-lockfile