Clarify "up to a reasonable number of redirect hops" for Handle HTTPS resolution support

[DeepMac]

Regarding:

atproto-website/src/app/[locale]/specs/handle/page.mdx

Line 144 in 41e60a0

HTTP redirects (eg, 301, 302) are allowed, up to a reasonable number of redirect hops.

There is no set maximum number of hops for HTTP redirects, and different browsers implement different numbers before declaring an infinite redirect. Recommend clarifying what specifically is acceptable within atproto.

https://www.rfc-editor.org/rfc/rfc2616#section-10.3 indicates previous max of five was recommended but removed. This is a solid number and I recommend it.