Clarification and fixing typos in discovery.kubernetes.md (#4509) (#4535

)

* Fix typos in discovery.kubernetes.md

* Update discovery.kubernetes.md

* Update docs/sources/flow/reference/components/discovery.kubernetes.md

Co-authored-by: Mischa Thompson <mischabear@gmail.com>

---------

Co-authored-by: Mischa Thompson <mischabear@gmail.com>
(cherry picked from commit 76fee88)

Co-authored-by: Piotr <17101802+thampiotr@users.noreply.github.com>

docs/sources/flow/reference/components/discovery.kubernetes.md

@@ -290,6 +290,10 @@ Name | Type | Description | Default | Required
 See Kubernetes' documentation for [Field selectors][] and [Labels and
 selectors][] to learn more about the possible filters that can be used.
 
+The endpoints role supports pod, service, and endpoints selectors.
+The pod role supports node selectors when configured with `attach_metadata: {node: true}`.
+Other roles only support selectors matching the role itself (e.g. node role can only contain node selectors).
+
 > **Note**: Using multiple `discovery.kubernetes` components with different
 > selectors may result in a bigger load against the Kubernetes API.
 >
@@ -299,7 +303,7 @@ selectors][] to learn more about the possible filters that can be used.
 > instead.
 
 [Field selectors]: https://kubernetes.io/docs/concepts/overview/working-with-objects/field-selectors/
-[Labels and selectros]: https://Kubernetes.io/docs/concepts/overview/working-with-objects/labels/
+[Labels and selectors]: https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/
 [discovery.relabel]: {{< relref "./discovery.relabel.md" >}}
 
 ### attach_metadata block