Bump certifi from 2022.12.7 to 2023.5.7 in /tests (#3882)

Bumps [certifi](https://github.com/certifi/python-certifi) from 2022.12.7 to 2023.5.7.
- [Commits](certifi/python-certifi@2022.12.07...2023.05.07)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

tests/requirements.txt

@@ -16,9 +16,9 @@ cachetools==5.3.0 \
     # via
     #   -r requirements.txt
     #   google-auth
-certifi==2022.12.7 \
-    --hash=sha256:35824b4c3a97115964b408844d64aa14db1cc518f6562e8d7261699d1350a9e3 \
-    --hash=sha256:4ad3232f5e926d6718ec31cfc1fcadfde020920e278684144551c91769c7bc18
+certifi==2023.5.7 \
+    --hash=sha256:0f0d56dc5a6ad56fd4ba36484d6cc34451e1c6548c61daad8c320169f91eddc7 \
+    --hash=sha256:c6c2e98f5c7869efca1f8916fed228dd91539f9f1b444c314c06eef02980c716
     # via
     #   -r requirements.txt
     #   kubernetes