Register and document annotations on Secret that relate to ServiceAccount (#32005)

* Registered secret annotation

Signed-off-by: Manish Kumar <[email protected]>

* Update content/en/docs/reference/labels-annotations-taints/_index.md

Co-authored-by: Tim Bannister <[email protected]>

* Update content/en/docs/reference/labels-annotations-taints/_index.md

Co-authored-by: Tim Bannister <[email protected]>

* Updated Secret type

Co-authored-by: Tim Bannister <[email protected]>

Author: Manish Kumar

content/en/docs/reference/labels-annotations-taints/_index.md

@@ -334,6 +334,24 @@ Used on: Service
 
 Kubernetes uses this label to differentiate multiple Services. Used currently for `ELB`(Elastic Load Balancer) only.
 
+### kubernetes.io/service-account.name
+
+Example: `kubernetes.io/service-account.name: "sa-name"`
+
+Used on: Secret
+
+This annotation records the {{< glossary_tooltip term_id="name" text="name">}} of the
+ServiceAccount that the token (stored in the Secret of type `kubernetes.io/service-account-token`) represents.
+
+### kubernetes.io/service-account.uid
+
+Example: `kubernetes.io/service-account.uid: da68f9c6-9d26-11e7-b84e-002dc52800da`
+
+Used on: Secret
+
+This annotation records the {{< glossary_tooltip term_id="uid" text="unique ID" >}} of the
+ServiceAccount that the token (stored in the Secret of type `kubernetes.io/service-account-token`) represents.
+
 ### endpointslice.kubernetes.io/managed-by {#endpointslicekubernetesiomanaged-by}
 
 Example: `endpointslice.kubernetes.io/managed-by="controller"`