new(rules): comment out new umount macro

keep in rules as hint for end users

Co-authored-by: Jason Dellaluce <jasondellaluce@gmail.com>
Co-authored-by: Andrea Terzolo <andrea.terzolo@polito.it>
Signed-off-by: incertum <melissa.kilby.oss@gmail.com>

rules/falco_rules.yaml

@@ -76,8 +76,8 @@
 
 # %evt.arg.flags available for evt.dir=>, but only for umount2
 # %evt.arg.name is path and available for evt.dir=<
-- macro: umount
-  condition: (evt.type in (umount, umount2))
+# - macro: umount
+#   condition: (evt.type in (umount, umount2))
 
 - macro: spawned_process
   condition: (evt.type in (execve, execveat) and evt.dir=<)