Helm - Update default RAM Request for tasks in sandbox

Based on the following kustomize change:
- 72c5705 Update default RAM Request for tasks in sandbox (flyteorg#750)

Signed-off-by: Sören Brunk <soeren@brunk.io>

helm/values-sandbox.yaml

@@ -126,6 +126,7 @@ configmap:
         - FLYTE_AWS_ENDPOINT: "http://minio.flyte:9000"
         - FLYTE_AWS_ACCESS_KEY_ID: minio
         - FLYTE_AWS_SECRET_ACCESS_KEY: miniostorage
+        default-memory: 200Mi
 
   task_logs:
     plugins: