chore: release 3.1.0 final

Author: kgriffs

setup.cfg

@@ -1,7 +1,7 @@
 [metadata]
 name = falcon
 version = attr: falcon.__version__
-description = An unladen web framework for building APIs and app backends.
+description = The ultra-reliable, fast ASGI+WSGI framework for building data plane APIs at scale.
 long_description_content_type = text/x-rst
 url = https://falconframework.org
 author = Kurt Griffiths
@@ -74,7 +74,7 @@ console_scripts =
 
 [egg_info]
 # TODO replace
-tag_build = rc3
+tag_build =
 
 [aliases]
 test=pytest