Bump pytest from 6.2.5 to 7.1.2 in /tests

Bumps [pytest](https://github.com/pytest-dev/pytest) from 6.2.5 to 7.1.2.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@6.2.5...7.1.2)

---
updated-dependencies:
- dependency-name: pytest
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

tests/requirements.txt

@@ -3,7 +3,7 @@ autograph-utils==0.1.1
 canonicaljson-rs==0.4.0
 httpie==3.2.1
 kinto-http==10.10.0
-pytest==6.2.5
+pytest==7.1.2
 pytest-asyncio==0.18.3
 pytest-selenium==3.0.0
 webtest==3.0.0