docs: fix broken anchor-link in "container restart" reference

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

Author: thaJeztah

docs/reference/commandline/container_restart.md

@@ -42,7 +42,7 @@ container, `SIGTERM` is used as default.
 ### <a name="timeout"></a> Stop container with timeout (-t, --timeout)
 
 The `--timeout` flag sets the number of seconds to wait for the container
-to stop after sending the pre-defined (see [`--signal`]{#signal)) system call signal.
+to stop after sending the pre-defined (see [`--signal`](#signal)) system call signal.
 If the container does not exit after the timeout elapses, it's forcibly killed
 with a `SIGKILL` signal.