Stale help link provided by `:checkhealth` output for tmux

[WillLillis]

Problem

When I run :checkhealth, I receive the following:

tmux ~
- OK escape-time: 50
- OK focus-events: on
- $TERM: xterm-256color
- ERROR $TERM should be "screen-256color" or "tmux-256color" in tmux. Colors might look wrong.
  - ADVICE:
    - Set default-terminal in ~/.tmux.conf:
      set-option -g default-terminal "screen-256color"
    - https://github.com/neovim/neovim/blob/docs/install/BUILD.md#building

Trying to visit the provided link results in a 404.

Steps to reproduce

Run :checkhealth while running neovim within tmux, without $TERM set to "screen-256-color" or "tmux-256color". Attempt to visit the provided help link.

Expected behavior

A valid help link.

Neovim version (nvim -v)

NVIM v0.10.0-dev-2000+g6fa0f303d

Vim (not Nvim) behaves the same?

N/A

Operating system/version

Ubuntu 22.04.3 LTS

Terminal name/version

Windows Command Prompt

$TERM environment variable

xterm-256color

Installation

build from repo

[zeertzjq]

Fixed by #27364