refactor GitHub Actions workflow for coverage checks and test reporting

Author: harshitha-cstk

.github/workflows/coverage-check.yml

@@ -17,14 +17,23 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
-
+      
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '18'
+          cache: 'npm'
+          
+      - run: npm ci
+      
+      - run: npm test -- --coverage --testMatch="**/test/unit/**/*.spec.ts"
+      
       - uses: ArtiomTr/jest-coverage-report-action@v2
         id: coverage
         with:
-          test-script: npm run test:unit
-          threshold: 95
           coverage-file: reports/contentstack-delivery/coverage/coverage-final.json
           base-coverage-file: reports/contentstack-delivery/coverage/coverage-final.json
+          threshold: 95
+          skip-step: all
 
       - name: Test Report
         uses: dorny/test-reporter@v1