selftest/ftrace: Fix typo in trigger-snapshot.tc

This patch fixes a spelling typo in trigger-snapshot.tc

[[email protected]: Fix typo in commit log]
Signed-off-by: Masanari Iida <[email protected]>
Acked-by: Steven Rostedt (VMware) <[email protected]>
Signed-off-by: Shuah Khan <[email protected]>

Author: standby24x7

tools/testing/selftests/ftrace/test.d/trigger/trigger-snapshot.tc

@@ -28,7 +28,7 @@ if [ -z "$FEATURE" ]; then
     exit_unsupported
 fi
 
-echo "Test snapshot tigger"
+echo "Test snapshot trigger"
 echo 0 > snapshot
 echo 1 > events/sched/sched_process_fork/enable
 ( echo "forked")