fix: update checkout step to handle issue comments for pull requests (#506)

Author: lkavindu199

.github/workflows/build-pipeline.yml

@@ -18,6 +18,8 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v6
+        with:
+          ref: ${{ github.event_name == 'issue_comment' && format('refs/pull/{0}/head', github.event.issue.number) || github.ref }}
 
       - name: Cache Node.js dependencies
         uses: actions/cache@v5
@@ -73,6 +75,8 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v6
+        with:
+          ref: ${{ github.event_name == 'issue_comment' && format('refs/pull/{0}/head', github.event.issue.number) || github.ref }}
 
       - name: Cache Node.js dependencies
         uses: actions/cache@v5
@@ -131,6 +135,8 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v6
+        with:
+          ref: ${{ github.event_name == 'issue_comment' && format('refs/pull/{0}/head', github.event.issue.number) || github.ref }}
 
       - name: Cache Node.js dependencies
         uses: actions/cache@v5