Change Istio labels paragraph

Signed-off-by: Kristóf Gyurácz <4431202+kristofgyuracz@users.noreply.github.com>

Author: kristofgyuracz

content/docs/whats-new/_index.md

@@ -70,9 +70,7 @@ spec:
 
 ### Istio support
 
-By default, Logging operator adds a label to avoid injecting the Istio sidecar into jobs/individual pods that run to completion. Configuration checkers and Fluentd drainer pods now have `sidecar.istio.io/inject` set to `false` by default. You can configure Fluentd drainer labels in the Logging spec.
-
-For non-istio users, these changes make no difference, as this label is only used in Istio context. For Istio users, these defaults make Logging operator work out of the box.
+For jobs/individual pods that run to completion, Istio sidecar injection needs to be disabled, otherwise the affected pods would live forever with the running sidecar container. Configuration checkers and Fluentd drainer pods can be configured with the label `sidecar.istio.io/inject` set to `false`. You can configure Fluentd drainer labels in the Logging spec.
 
 ### Improved buffer metrics