Add note about prefix/suffix globbing on policy parameters

website/source/docs/concepts/policies.html.md

@@ -139,6 +139,10 @@ values) that a user is allowed to specify when calling a path.
     `denied_parameters` object all keys not specified will be allowed (unless
     `allowed_parameters` is also set, in which case normal rules will apply).
 
+String values inside a populated value array support prefix/suffix globbing. 
+Globbing is enabled by prepending or appending a `*` to the value (e.g. 
+`["*foo", "bar*"]` would match `"...foo"` and `"bar..."`).
+
 ### Required Minimum/Maximum Response Wrapping TTLs
 
 These parameters can be used to set minimums/maximums on TTLs set by clients