fix typo

Author: pietki8q

strucscan/resources/properties.yaml

@@ -1,7 +1,7 @@
 # Each property that requires any kind of pre-processing, e.g.
 # generation of multiple input structure files
 # are 'advanced' properties and should be listed here.
-# The instruction after the colon indicate which property is prerequisite.
+# The instruction after the colon indicates which property is prerequisite.
 # For the properties before the colon, no relaxation will be performed.
 # If the property is 'advanced' but requires no prerequisite,
 # no conditional property needs to be entered after the colon (= None).