Revert "Revert "Update cobra/pflag. Also update generated kubectl documentation.""

This reverts commit 69432e8b2f.

    COMMIT_BLOCKED_ON_GENDOCS

docs/kubectl-config-use-context.md

@@ -11,6 +11,12 @@ Sets the current-context in a .kubeconfig file
 kubectl config use-context CONTEXT_NAME
 ```
 
+### Options
+
+```
+  -h, --help=false: help for use-context
+```
+
 ### Options inherrited from parent commands
 
 ```
@@ -24,7 +30,6 @@ kubectl config use-context CONTEXT_NAME
       --context="": The name of the kubeconfig context to use
       --envvar=false: use the .kubeconfig from $KUBECONFIG
       --global=false: use the .kubeconfig from /home/username
-  -h, --help=false: help for config
       --insecure-skip-tls-verify=false: If true, the server's certificate will not be checked for validity. This will make your HTTPS connections insecure.
       --kubeconfig="": use a particular .kubeconfig file
       --local=false: use the .kubeconfig in the current directory