[Docs] Quick Links in readme file don't all point to valid pages.

[jwdonahue]

The readme.md file displayed at https://github.com/GitTools/GitVersion has some broken links:

The following list entries return Page not found:

• Why GitVersion
• Usage
• FAQ
• Who is using GitVersion

[asbjornu]

Thanks for reporting. #2609 should fix this.

[arturcic]

🎉 This issue has been resolved in version 5.6.7 🎉
The release is available on:

• GitHub Release
• Chocolatey Package
• .Net Global Tool

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