fix typo for top_file_merging_strategy in salt/files/master.d/f_defaults.conf template

salt/files/master.d/f_defaults.conf

@@ -650,7 +650,7 @@ master_tops:
 # default behaviour is an unordered merge. To prevent top files from
 # being merged together and instead to only use the top file from the
 # requested environment, set this value to 'same'.
-{{ get_config('top_file_merging_stragety', 'merge') }}
+{{ get_config('top_file_merging_strategy', 'merge') }}
 
 # To specify the order in which environments are merged, set the ordering
 # in the env_order option. Given a conflict, the last matching value will