DIAC-1029: Points to PR-984 for ia-case-docmenta-api

Author: sabahirfan

charts/ia-case-api/values.preview.template.yaml

@@ -133,7 +133,7 @@ ia-case-documents-api:
   enabled: true #set to true if testing against a local branch
   java:
     imagePullPolicy: Always
-    image: hmctspublic.azurecr.io/ia/case-documents-api:latest
+    image: hmctspublic.azurecr.io/ia/case-documents-api:pr-984
     releaseNameOverride: ${SERVICE_NAME}-case-documents-api
     ingressHost: ${SERVICE_NAME}-documents-api.preview.platform.hmcts.net
     devcpuRequests: 500m