MAINTAINERS: Lauri is still available but is really low on time nowadays

CC: Lauri Kasanen <cand@gmx.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit e531b3ff27fcfa9110e71ba291888778ecb3b0f4)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

MAINTAINERS

@@ -513,7 +513,7 @@ MIPS                                    Manojkumar Bhosale, Shiyou Yin
 LoongArch                           [2] Shiyou Yin
 Mac OS X / PowerPC                  [0]
 Amiga / PowerPC                         Colin Ward
-Linux / PowerPC                         Lauri Kasanen
+Linux / PowerPC                     [1] Lauri Kasanen
 RISC-V                              [2] Rémi Denis-Courmont
 Windows MinGW                           Alex Beregszaszi, Ramiro Polla
 Windows Cygwin                          Victor Paesa