docs(agent-skill): name GitHub Copilot among the CLIs that get no skill copy

Copilot's registry entry takes no agent skill, like Pi and a plain shell, but
the changeset, the App Settings help text, the Settings Reference and
CLAUDE.md named only Pi (and the shell). The Agent CLIs wiki page still said
no CLI but Claude gets the bundled skill; every CLI except Pi and Copilot
gets it, in `.agents/skills/`.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/web/public/index.html

@@ -2941,7 +2941,7 @@
                   <div class="set-row" data-search="agent skill codeman api workers codex gemini opencode pi grok deepseek omp antigravity">
                     <div class="set-row-text">
                       <span class="set-row-label">Codeman Agent Skill</span>
-                      <span class="set-row-desc">Write Codeman's agent skill into each new session's folder, where that CLI looks for skills, so the agent in it can start workers in any installed CLI, send them prompts and wait for results. Every CLI except Pi and a plain shell. On by default. The copy ignores itself in git, so your repository never lists it as a new file. Off stops new copies but removes none: <code>codeman skill uninstall --case &lt;name&gt;</code> does that.</span>
+                      <span class="set-row-desc">Write Codeman's agent skill into each new session's folder, where that CLI looks for skills, so the agent in it can start workers in any installed CLI, send them prompts and wait for results. Every CLI except Pi, GitHub Copilot and a plain shell. On by default. The copy ignores itself in git, so your repository never lists it as a new file. Off stops new copies but removes none: <code>codeman skill uninstall --case &lt;name&gt;</code> does that.</span>
                     </div>
                     <label class="switch switch-sm"><input type="checkbox" id="appSettingsAgentSkill"><span class="slider"></span></label>
                   </div>