Update submodule-codebuild-ci.yml

Author: mollyheamazon

.github/workflows/submodule-codebuild-ci.yml

@@ -2,11 +2,12 @@ name: Sagemaker PR Checks
 on:
   pull_request_target:
     branches:
-      - "master-v3"
+      - "master"
     paths:
       - 'sagemaker-train/**'
       - 'sagemaker-serve/**'
       - 'sagemaker-mlops/**'
+      - 'sagemaker-core/**'
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.head_ref }}
@@ -93,6 +94,13 @@ jobs:
               SUBMODULES=$(echo $SUBMODULES | sed 's/\]$/,"sagemaker-mlops"\]/')
             fi
           fi
+          if echo "$CHANGES" | grep -q "^sagemaker-core/"; then
+            if [ "$SUBMODULES" = '[]' ]; then
+              SUBMODULES='["sagemaker-core"]'
+            else
+              SUBMODULES=$(echo $SUBMODULES | sed 's/\]$/,"sagemaker-core"\]/')
+            fi
+          fi
           echo "Final SUBMODULES: $SUBMODULES"
           echo "submodules=$SUBMODULES" >> $GITHUB_OUTPUT
 
@@ -158,4 +166,4 @@ jobs:
         uses: aws-actions/aws-codebuild-run-build@v1
         with:
           project-name: ${{ github.event.repository.name }}-ci-${{ matrix.submodule }}-integ-tests
-          source-version-override: 'refs/pull/${{ github.event.pull_request.number }}/head^{${{ github.event.pull_request.head.sha }}}'
+          source-version-override: 'refs/pull/${{ github.event.pull_request.number }}/head^{${{ github.event.pull_request.head.sha }}}'