Update pytest requirement from ~=8.3.2 to ~=8.4.0

Updates the requirements on [pytest](https://github.com/pytest-dev/pytest) to permit the latest version.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@8.3.2...8.4.0)

---
updated-dependencies:
- dependency-name: pytest
  dependency-version: 8.4.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements_test.txt

@@ -52,7 +52,7 @@ jax[cpu]==0.4.30
 # lingvo==0.13.1
 
 # tests and style checking
-pytest~=8.3.2
+pytest~=8.4.0
 pytest-mock~=3.14.1
 pytest-cov~=6.1.1
 pylint==3.3.7