docs(changes): fix a broken class link in 3.1.0 notes (#2038)

docs/changes/3.1.0.rst

@@ -13,7 +13,7 @@ Due to popular demand, :class:`~falcon.testing.TestClient` and
 :class:`~falcon.testing.ASGIConductor` now expose convenience shorthand aliases
 for the ``simulate_*`` methods, i.e.,
 :func:`~falcon.testing.TestClient.simulate_get` is now also available as
-:func:`~falcon.testing.TestClient.get`, etc. (`#1806 <https://github.com/falconry/falcon/issues/1806>`__)
+:func:`~falcon.testing.TestClient.get`, etc.
 
 Some important bugs were also fixed to ensure applications properly clean up
 response streams and do not hang when reading request bodies that are
@@ -65,7 +65,7 @@ New & Improved
   ``Content-Length`` header indicating a served file's size
   (or length of the rendered content range). (`#1991 <https://github.com/falconry/falcon/issues/1991>`__)
 - When called with deprecated positional arguments, methods and class
-  initializers (such as :class:`falcon.errors.HTTPError`) will now emit a
+  initializers (such as :class:`falcon.HTTPError`) will now emit a
   user-friendlier warning indicating the fully qualified name of the method in
   question. (`#2010 <https://github.com/falconry/falcon/issues/2010>`__)