shellcheck: silence trap-only cleanup warning in Geekbench

Add a targeted SC2317 annotation for the trap-invoked cleanup function in
Runner/suites/Performance/Geekbench/run.sh without changing runtime
behavior.

Signed-off-by: Srikanth Muppandam <smuppand@qti.qualcomm.com>

Author: smuppand

Runner/suites/Performance/Geekbench/run.sh

@@ -297,6 +297,7 @@ if [ "$SET_PERF_GOV" = "1" ]; then
   set_performance_governor || true
 fi
 
+# shellcheck disable=SC2317  # cleanup is invoked via trap
 cleanup() {
   if [ "$SET_PERF_GOV" = "1" ]; then
     restore_governor || true