docs(config): fix unbalanced inline literal in remember-me sample comment

Add missing space before the ``0`` inline literal so the generated RST
in the documentation repo lints cleanly (unbalanced-inline-literals-delimiters
/ missing-space-before-default-role).

Assisted-by: ClaudeCode:claude-opus-4-8
Signed-off-by: skjnldsv <skjnldsv@protonmail.com>

config/config.sample.php

@@ -332,7 +332,7 @@ $CONFIG = [
 	/**
 	 * Lifetime of logins where the user selected "Remember me", in seconds.
 	 *
-	 * A value >``0`` means "Remember me" is available.
+	 * A value > ``0`` means "Remember me" is available.
 	 * To make "Remember me" unavailable to users, set to ``0``.
 	 *
 	 * To avoid unexpected expiry, set this higher than ``session_lifetime``.