[PR #8700/92e14f86 backport][3.10] Add aiohttp-apischema to supported libraries (#8702)

**This is a backport of PR #8700 as merged into master
(92e14f8).**

Co-authored-by: Sam Bull <git@sambull.org>

Author: patchback[bot]

CHANGES/8700.doc.rst

@@ -0,0 +1 @@
+Added ``aiohttp-apischema`` to supported libraries -- by :user:`Dreamsorcerer`.

docs/third_party.rst

@@ -30,6 +30,10 @@ and located on https://github.com/aio-libs
 aiohttp extensions
 ^^^^^^^^^^^^^^^^^^
 
+- `aiohttp-apischema <https://github.com/aio-libs/aiohttp-apischema>`_
+  provides automatic API schema generation and validation of user input
+  for :mod:`aiohttp.web`.
+
 - `aiohttp-session <https://github.com/aio-libs/aiohttp-session>`_
   provides sessions for :mod:`aiohttp.web`.