docs: update README.md

Author: GamerGirlandCo

README.md

@@ -249,8 +249,9 @@ type Routes interface {
 ```
 
 Each routing method accepts a URL `pattern` and chain of `handlers`. The URL pattern
-supports named params (ie. `/users/{userID}`) and wildcards (ie. `/admin/*`). URL parameters
-can be fetched at runtime by calling `chi.URLParam(r, "userID")` for named parameters
+supports named params (ie. `/users/{userID}`), slash-matching named params
+(ie. `/files/{path:*}`), and wildcards (ie. `/admin/*`). URL parameters can be
+fetched at runtime by calling `chi.URLParam(r, "userID")` for named parameters
 and `chi.URLParam(r, "*")` for a wildcard parameter.