perf annotate browser: Help for cycling thru hottest instructions with TAB/shift+TAB

The popup help accessed via 'h' wasn't mentioning about TAB and
shift-TAB, just about 'H', which goes to the hottest line, while the
former two are the hotkeys for actually cycling thru the hottest lines.

Reported-by: Flavio Bruno Leitner <fbl@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Taeung Song <treeze.taeung@gmail.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-5ppym6odizfj1ifa4t7neiku@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

+2 -1
+2 -1
tools/perf/ui/browsers/annotate.c
··· 829 829 "q/ESC/CTRL+C Exit\n\n" 830 830 "ENTER Go to target\n" 831 831 "ESC Exit\n" 832 - "H Cycle thru hottest instructions\n" 832 + "H Go to hottest instruction\n" 833 + "TAB/shift+TAB Cycle thru hottest instructions\n" 833 834 "j Toggle showing jump to target arrows\n" 834 835 "J Toggle showing number of jump sources on targets\n" 835 836 "n Search next string\n"