Update troubleshoot-kubectl.md

In this section - I found the provided commands didn't generate the desired results.

The proposed commands seem to work for me.

Validated with:

kubectl version
Client Version: v1.28.6
Kustomize Version: v5.0.4-0.20230601165947-6ce0bf390ce3
Server Version: v1.28.6

openssl version
OpenSSL 3.0.2 15 Mar 2022 (Library: OpenSSL 3.0.2 15 Mar 2022)

base64 (GNU coreutils) 8.32

Author: wushka00

content/en/docs/tasks/debug/debug-cluster/troubleshoot-kubectl.md

@@ -123,23 +123,23 @@ directory. The `certificate-authority` attribute contains the CA certificate and
 Verify the expiry of these certificates:
 
 ```shell
-openssl x509 -noout -dates -in $(kubectl config view --minify --output 'jsonpath={.clusters[0].cluster.certificate-authority}')
+kubectl config view --flatten --output 'jsonpath={.clusters[0].cluster.certificate-authority-data}' | base64 -d | openssl x509 -noout -dates
 ```
 
 output:
 ```console
-notBefore=Sep  2 08:34:12 2023 GMT
-notAfter=Aug 31 08:34:12 2033 GMT
+notBefore=Feb 13 05:57:47 2024 GMT
+notAfter=Feb 10 06:02:47 2034 GMT
 ```
 
 ```shell
-openssl x509 -noout -dates -in $(kubectl config view --minify --output 'jsonpath={.users[0].user.client-certificate}')
+kubectl config view --flatten --output 'jsonpath={.users[0].user.client-certificate-data}'|base64 -d | openssl x509 -noout -dates
 ```
 
 output:
 ```console
-notBefore=Sep  2 08:34:12 2023 GMT
-notAfter=Sep  2 08:34:12 2026 GMT
+notBefore=Feb 13 05:57:47 2024 GMT
+notAfter=Feb 12 06:02:50 2025 GMT
 ```
 
 ## Verify kubectl helpers
@@ -155,4 +155,4 @@ kubectl config view
 ```
 
 If you previously used a helper tool (for example, `kubectl-oidc-login`), ensure that it is still
-installed and configured correctly.
+installed and configured correctly.