Update trustme requirement from ~=1.2.0 to ~=1.2.1

Updates the requirements on [trustme](https://github.com/python-trio/trustme) to permit the latest version.
- [Release notes](https://github.com/python-trio/trustme/releases)
- [Commits](python-trio/trustme@v1.2.0...v1.2.1)

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

Signed-off-by: dependabot[bot] <support@github.com>

functest_requirements.txt

@@ -7,7 +7,7 @@ pytest-custom_exit_code
 pytest-xdist
 python-gnupg
 proxy.py~=2.4.9
-trustme~=1.2.0
+trustme~=1.2.1
 
 # pulp_file tests
 beautifulsoup4