doc: add a disclamer for the TLS handshake timeouts TL;DR bug in godebug.md
Relates to #71257. Since post-quantum TLS algorithms are enabled by default, we should warn about the possible bugs with legacy servers (see https://tldr.fail/)
Change-Id: I06a5d8a927497ea2141007b14a90af27e0891720
GitHub-Last-Rev:
476e6462dfc7db8c2a47a25dcb7eb342264aabad
GitHub-Pull-Request: golang/go#71865
Reviewed-on: https://go-review.googlesource.com/c/go/+/651036
Reviewed-by: Roland Shoemaker <roland@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>