Change in --help commands of read and write

[bgshri]

Solves https://github.com/hashicorp/vault/issues/16788

[hashicorp-cla]

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[aphorise]

@bgshri

1. Add changelog/17011.txt with something like the following:

   cli: Example vault read / write updated in help page.
   

2. Sign CLA

[bgshri]

@aphorise

1. Added the change log

2. Already signed CLA but its not reflecting

[peteski22]

Hi @bgshri , thanks for your submission. Are you able to go through the process of signing the CLA again please? The error message in Github maybe implies that a different account was tried when signing?

bbhaya seems not to be a GitHub user.

[aphorise]

I've gone ahead and created: #19064 - with the small changes that supersedes this PR.

Hey @bgshri - thanks for making the effort to raise this.