improve intro to task.md ref page

Signed-off-by: Meg McRoberts <meg.mcroberts@dynatrace.com>

docs/content/en/docs/yaml-crd-ref/task.md

@@ -4,12 +4,12 @@ description: Define a run of a KeptnTaskDefinition
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-Keptn automatically populates the `KeptnTask` resource
-for tasks that deploy software on Kubernetes.
-However, when using Keptn to run tasks for software
-that is deployed outside of Kubernetes,
-you must create the `KeptnTask` resource manually
-and modify it manually for each new run.
+Keptn uses KeptnTask resources internally
+to manage tasks (and their underlying Kubernetes Job resources)
+that are run before and after deployment of your workloads
+(pre- and post-deployment tasks).
+You do not need to create this resource yourself except in special situations,
+like using Keptn to manage workloads that are outside of the k8s cluster.
 
 ## Synopsis