Fix link in the footer

[debo19]

Description
The link directs to https://getnighthawk.dev/docs/what-is-getnighthawk but the page doesn't exist.

Expected Behavior
The link should direct to https://getnighthawk.dev/docs/what-is-nighthawk/

Screenshots

Environment:

• OS: [e.g. Ubuntu]
• Browser: [e.g. Chrome, Safari]
• Version: [e.g. 22]
• Device: [e.g. laptop, iPhone 8]

---

[Optional] To Reproduce
Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

[Optional] Additional Context

---

Contributor Resources

• See the Contributing to getnighthawk.dev Website
• See the Project Site section of GetNighthawk project doc

[welcome]

Thanks for opening this issue. A contributor will be by to give feedback soon. In the meantime, please review the Layer5 Community Welcome Guide and sure to join the community Slack.

[Swapnil-Bhabal]

Kindly assign this task to me @debo19

[Swapnil-Bhabal]

#232
Thats my PR on this issue @debo19 , i have made the required changes
Kindly review my PR, Thank you.

[ahmadateya]

I think this issue should be closed too.

I am looking for a small good first issue to start with, that's why I am leaving this comments 😅

[leecalcote]

@ahmadateya here's one - meshery/meshery-nsm#135

This link might be helpful in finding others - https://github.com/issues?q=is%3Aopen+is%3Aissue+archived%3Afalse+org%3Alayer5io+org%3Ameshery+org%3Aservice-mesh-performance+org%3Aservice-mesh-patterns+label%3A%22help+wanted%22+

[ahmadateya]

@leecalcote thank you ❤️