fixed a typo in comments (#439)

Signed-off-by: Sina Tak Tehrani <[email protected]>

roles/ssh_hardening/tasks/hardening.yml

@@ -14,7 +14,7 @@
 
 # we only override variables with our default, if they have not been specified already
 # by default the lookup functions finds all varnames containing the string, therefore
-# we add ^ and $ to denote start and end of string, so this returns only exact maches
+# we add ^ and $ to denote start and end of string, so this returns only exact matches
 - name: Set OS dependent variables, if not already defined by user
   set_fact:
     '{{ item.key }}': '{{ item.value }}'