fix: add missing service image

Author: scottgerring

manifests/base/load-test-service/deployment.yaml

@@ -16,7 +16,7 @@ spec:
     spec:
       containers:
       - name: load-test-service
-        image: load-test-service
+        image: ghcr.io/datadog/sdlc-gitops-sample-stack/load-test-service:latest
         imagePullPolicy: IfNotPresent
         env:
         - name: K6_SCRIPT
@@ -69,4 +69,4 @@ spec:
             memory: 128Mi
           limits:
             cpu: 500m
-            memory: 256Mi 
+            memory: 256Mi