watchdog: Change suffix .txt to .rst in references

Fix link to documentation, which has already been converted to reST.
Also remove apostrophes which are no longer needed.

Signed-off-by: Philipp Hahn <phahn-oss@avm.de>
Link: https://lore.kernel.org/r/bb1aa3129d5e52bc4c8e1ec3340b88f80f726fef.1777972790.git.phahn-oss@avm.de
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Philipp Hahn 2026-05-05 11:26:12 +02:00 • committed by Guenter Roeck
commit d15a35c059