docs: fix the URL to faasd

[alexandear]

The link https://docs.openfaas.com/deployment/faasd/ has been moved to https://docs.openfaas.com/deployment/edge/. The previous version can be viewed at https://web.archive.org/web/20250121162548/https://docs.openfaas.com/deployment/faasd/.

Wayback Machive Screenshot

This broken link was found with the help of lychee:

❯ lychee --no-progress --max-concurrency 1 --scheme https --scheme http .
   [WARN ] Error creating request: InvalidPathToUri("/images/internals/lima-sequence-diagram.png")
   [WARN ] Error creating request: InvalidPathToUri("/images/demo.gif")
   [WARN ] Error creating request: InvalidPathToUri("/images/cncf-color-bg.svg")
   [ERROR] http://127.0.0.1:8080/
     [404] https://docs.openfaas.com/deployment/faasd/
Issues found in 2 inputs. Find details below.

[./templates/README.md]:
     [404] https://docs.openfaas.com/deployment/faasd/ | Rejected status code (this depends on your "accept" configuration): Not Found

[./website/content/en/docs/examples/_index.md]:
   [ERROR] http://127.0.0.1:8080/ | Network error: error sending request for url (http://127.0.0.1:8080/) Maybe a certificate error?

🔍 295 Total (in 1m 9s) ✅ 159 OK 🚫 2 Errors 👻 134 Excluded

[jandubois]

Thanks, LGTM