perf c2c: Fix a punctuation

s/dont/don\'t/
Signed-off-by: Bhaskar Chowdhury <unixbhaskar@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20210319232824.742-1-unixbhaskar@gmail.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-c2c.c

@@ -2050,7 +2050,7 @@ static int hpp_list__parse(struct perf_hpp_list *hpp_list,
 	perf_hpp__setup_output_field(hpp_list);
 
 	/*
-	 * We dont need other sorting keys other than those
+	 * We don't need other sorting keys other than those
 	 * we already specified. It also really slows down
 	 * the processing a lot with big number of output
 	 * fields, so switching this off for c2c.