Update hypothesis requirement from <6.68.3 to <6.68.4 (#4136)

Updates the requirements on [hypothesis](https://github.com/HypothesisWorks/hypothesis) to permit the latest version.
- [Release notes](https://github.com/HypothesisWorks/hypothesis/releases)
- [Commits](HypothesisWorks/hypothesis@hypothesis-ruby-0.0.1...hypothesis-python-6.68.3)

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

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

requirements_test.txt

@@ -4,7 +4,7 @@
 cmocean<2.1
 codecov<2.2.0
 colorcet<3.1.0
-hypothesis<6.68.3
+hypothesis<6.68.4
 imageio-ffmpeg<0.5.0
 ipygany<0.6.0
 ipython<9.0.0