Update setuptools requirement from <68.1.0 to <68.3.0 in /requirements (#18517)

Updates the requirements on [setuptools](https://github.com/pypa/setuptools) to permit the latest version.
- [Release notes](https://github.com/pypa/setuptools/releases)
- [Changelog](https://github.com/pypa/setuptools/blob/main/NEWS.rst)
- [Commits](pypa/setuptools@0.6...v68.2.0)

---
updated-dependencies:
- dependency-name: setuptools
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
(cherry picked from commit 941c446)

Author: dependabot[bot]

requirements/app/test.txt

@@ -10,5 +10,5 @@ httpx ==0.24.1
 trio <0.22.0  # strict https://github.com/python-trio/trio/pull/2213
 pympler
 psutil <5.10.0
-setuptools <68.1.0
+setuptools <68.3.0
 requests-mock ==1.11.0