Update checkout action v3 to v4

Author: sadabnepal

.github/workflows/regression.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout git project
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Install packages
       run: npm ci
@@ -26,4 +26,4 @@ jobs:
       with:
         name: Generate Result
         path: report/index.json
-        reporter: mochawesome-json
+        reporter: mochawesome-json