MAINTAINERS: Update Jiri's email address

Using my kernel.org email.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20220208221117.710405-1-jolsa@kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

MAINTAINERS

@@ -15147,7 +15147,7 @@ M:	Ingo Molnar <mingo@redhat.com>
 M:	Arnaldo Carvalho de Melo <acme@kernel.org>
 R:	Mark Rutland <mark.rutland@arm.com>
 R:	Alexander Shishkin <alexander.shishkin@linux.intel.com>
-R:	Jiri Olsa <jolsa@redhat.com>
+R:	Jiri Olsa <jolsa@kernel.org>
 R:	Namhyung Kim <namhyung@kernel.org>
 L:	linux-perf-users@vger.kernel.org
 L:	linux-kernel@vger.kernel.org