docs: correct incorrect redirect link on README

[froggy1014]

Description

While working on the Vonage API, I noticed that there is an incorrect redirect link attached to the account section in the README.md file.

Motivation and Context

Testing Details

Example Output or Screenshots (if appropriate)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[manchuck]

Thanks for finding this. It's a bit tough when you have 30 Readmes to maintain 😃