Update image scan workflow for v1.32.4 (#914)

*Description of changes:*

Final step of MCM:

https://mcm.amazon.dev/cms/MCM-112315558/execution/step/e035bb70-e64d-4aee-a26f-ac4c2c11c029

By submitting this pull request, I confirm that my contribution is made
under the terms of the Apache 2.0 license.

.github/workflows/owasp.yml

@@ -77,15 +77,15 @@ jobs:
         id: high_scan
         uses: ./.github/actions/image_scan
         with:
-          image-ref: "public.ecr.aws/aws-observability/adot-autoinstrumentation-java:v1.32.3"
+          image-ref: "public.ecr.aws/aws-observability/adot-autoinstrumentation-java:v1.32.4"
           severity: 'CRITICAL,HIGH'
 
       - name: Perform low image scan
         if: always()
         id: low_scan
         uses: ./.github/actions/image_scan
         with:
-          image-ref: "public.ecr.aws/aws-observability/adot-autoinstrumentation-java:v1.32.3"
+          image-ref: "public.ecr.aws/aws-observability/adot-autoinstrumentation-java:v1.32.4"
           severity: 'MEDIUM,LOW,UNKNOWN'
 
       - name: Configure AWS Credentials for emitting metrics