chore(skills): regenerate cli-serve after --ready-timeout was added

`check:agent-skills-sync` (ci.yml:lint) has been failing on release/v3.8.51
because the generated skills/cli-serve/SKILL.md no longer matches the command
catalog. fc111dc1 (make startup readiness budget configurable) added the
`--ready-timeout <ms>` flag to bin/cli/commands/serve.mjs without regenerating
the skill.

This is the generator's output, unedited: a single added line listing the
flag, which exists at bin/cli/commands/serve.mjs:62. No other skill changed
(Generated: 1 · Unchanged: 45 before, Generated: 0 · Unchanged: 46 after).

skills/cli-serve/SKILL.md

@@ -55,6 +55,7 @@ omniroute restart
 - `--max-restarts <n>`
 - `--tray`
 - `--no-tray`
+- `--ready-timeout <ms>`
 - `--tls-cert <path>`
 - `--tls-key <path>`