feat(profile): replace former regex by the new @{user} variable.

apparmor.d/groups/ssh/sshd

@@ -91,7 +91,7 @@ profile sshd @{exec_path} flags=(attach_disconnected) {
   owner @{HOME}/@{XDG_SSH_DIR}/authorized_keys{,.*} r,
   owner @{user_cache_dirs}/{,motd*} rw,
 
-        @{run}/faillock/[a-zA-z0-9]* rwk,
+        @{run}/faillock/@{user} rwk,
         @{run}/motd.d/{,*} r,
         @{run}/motd.dynamic rw,
         @{run}/motd.dynamic.new rw,