README.md: Add reference to manpage - cmd-timer - run command at a specific interval

commit: 950b0f4fa4a85698d4c94f89c4d4fced37e8cf50
parent f9874df533be83ebb2f05e30b7ce3be608bf25f1
Author: Haelwenn (lanodan) Monnier <contact@hacktivis.me>
Date:   Wed, 18 Jun 2025 12:42:51 +0200

README.md: Add reference to manpage

Diffstat:
M README.md 2 ++

1 file changed, 2 insertions(+), 0 deletions(-)
diff --git a/README.md b/README.md
@@ -4,6 +4,8 @@ SPDX-FileCopyrightText: 2025 Haelwenn (lanodan) Monnier <contact+cmd-timer@hackt
 SPDX-License-Identifier: MIT
 ```
 
+Extracted from the manpage (see [./timer.1](https://hacktivis.me/git/cmd-timer.mdoc/))
+
 The `timer` utility runs `command [arguments...]` at every `interval`.
 
 `interval` is a string containing numbers, terminated by suffixes: