chore: add missing steps to coverage job

Author: david-luna

.github/workflows/pr-test.yml

@@ -207,6 +207,15 @@ jobs:
     runs-on: ubuntu-latest
     needs: unit-and-tav-test
     steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 18
+      - name: Install
+        run: npm ci
       - name: Download Test Artifacts (18)
         uses: actions/download-artifact@v4
         with: