set action version to investigation branch

Author: bluesentinelsec

.github/workflows/test_multi_arch_images.yml

@@ -32,7 +32,7 @@ jobs:
 
       - name: Test multi-arch image
         id: inspector
-        uses: aws-actions/vulnerability-scan-github-action-for-amazon-inspector@v1.4.0
+        uses: aws-actions/vulnerability-scan-github-action-for-amazon-inspector@investigate_multi_arch
         with:
           artifact_type: 'container'
           artifact_path: 'debian:trixie'