Fix ObservabilityPolicy TargetRefs documentation (#2202)

Problem:
- The documentation for the targetRefs field of ObservabilityPolicy
  doesn't include GRPCRoute as supported kind.

Solution:
- Fix that.

Author: pleshakov

Diff for: apis/v1alpha1/observabilitypolicy_types.go

@@ -45,7 +45,7 @@ type ObservabilityPolicySpec struct {
 
 	// TargetRefs identifies the API object(s) to apply the policy to.
 	// Objects must be in the same namespace as the policy.
-	// Support: HTTPRoute
+	// Support: HTTPRoute, GRPCRoute.
 	//
 	// +kubebuilder:validation:MaxItems=16
 	// +kubebuilder:validation:XValidation:message="TargetRef Kind must be: HTTPRoute or GRPCRoute",rule="(self.exists(t, t.kind=='HTTPRoute') || self.exists(t, t.kind=='GRPCRoute'))"

Diff for: config/crd/bases/gateway.nginx.org_observabilitypolicies.yaml

@@ -54,7 +54,7 @@ spec:
                 description: |-
                   TargetRefs identifies the API object(s) to apply the policy to.
                   Objects must be in the same namespace as the policy.
-                  Support: HTTPRoute
+                  Support: HTTPRoute, GRPCRoute.
                 items:
                   description: |-
                     LocalPolicyTargetReference identifies an API object to apply a direct or

Diff for: deploy/crds.yaml

@@ -836,7 +836,7 @@ spec:
                 description: |-
                   TargetRefs identifies the API object(s) to apply the policy to.
                   Objects must be in the same namespace as the policy.
-                  Support: HTTPRoute
+                  Support: HTTPRoute, GRPCRoute.
                 items:
                   description: |-
                     LocalPolicyTargetReference identifies an API object to apply a direct or

Diff for: site/content/reference/api.md

@@ -416,7 +416,7 @@ Tracing
 <td>
 <p>TargetRefs identifies the API object(s) to apply the policy to.
 Objects must be in the same namespace as the policy.
-Support: HTTPRoute</p>
+Support: HTTPRoute, GRPCRoute.</p>
 </td>
 </tr>
 </table>
@@ -949,7 +949,7 @@ Tracing
 <td>
 <p>TargetRefs identifies the API object(s) to apply the policy to.
 Objects must be in the same namespace as the policy.
-Support: HTTPRoute</p>
+Support: HTTPRoute, GRPCRoute.</p>
 </td>
 </tr>
 </tbody>