📝 update routes.md to mention the new path converter

docs/routes.md

@@ -103,6 +103,7 @@ You can pass integers, strings, and positive floats with the following types:
 - str
 - int
 - float
+- path (see below)
 
 A URL can also have multiple capture groups:
 
@@ -113,6 +114,15 @@ def example(request, id, name):
 ```
 In this case, a valid URL might be `/example/3/james`, and both sections will be split out and passed to the view.
 
+The `path` option is special; this is used when you want to capture everything after the slash. For example:
+
+```python
+@app.route("/example/<path:rest>")
+def example(request, rest):
+    return HttpResponse(body=f"Example with {rest}")
+```
+It will come in as a string, but it will include all the slashes and other characters that are in the URL.
+
 ## Adding Error Views
 
 For some apps, you may want to have your own error views that are themed to your particular application. For this, there's a slightly different process, but the gist is the same. There are also three ways to handle error views, all very similar to adding regular views.
@@ -184,4 +194,4 @@ path = app.reverse("example", {'obj_id': 3}, query={'name': 'james'})
 print(path)  # -> "/example/3?name=james"
 ```
 
-The arguments you pass in must match what the path expects, or you'll get a `SpiderwebException`. If there's no route with that name, you'll get a `ReverseNotFound` exception instead.
+The arguments you pass in must match what the path expects, or you'll get a `SpiderwebException`. If there's no route with that name, you'll get a `ReverseNotFound` exception instead.