Merge pull request #57218 from iloayuil/typo

Automatic merge from submit-queue (batch tested with PRs 56375, 56872, 57053, 57165, 57218). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

typo wrong, not "namespace", but "secretName"

namespace, _ := claims[NamespaceClaim].(string)
		if len(namespace) == 0 {
			return nil, false, errors.New("namespace claim is missing")
		}
		secretName, _ := claims[SecretNameClaim].(string)
		if len(namespace) == 0 {
			return nil, false, errors.New("secretName claim is missing")
		}



**What this PR does / why we need it**:

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```

pkg/serviceaccount/jwt.go

@@ -194,7 +194,7 @@ func (j *jwtTokenAuthenticator) AuthenticateToken(token string) (user.Info, bool
 			return nil, false, errors.New("namespace claim is missing")
 		}
 		secretName, _ := claims[SecretNameClaim].(string)
-		if len(namespace) == 0 {
+		if len(secretName) == 0 {
 			return nil, false, errors.New("secretName claim is missing")
 		}
 		serviceAccountName, _ := claims[ServiceAccountNameClaim].(string)