build(deps): update pytest requirement in /.dagger-ci/daggerci

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@8.3.0...8.4.0)

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

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

Author: dependabot[bot]

.dagger-ci/daggerci/requirements.txt

@@ -1,7 +1,7 @@
 anyio~=4.9
 dagger-io~=0.16
 prettytable~=3.16
-pytest~=8.3
+pytest~=8.4
 pytest-benchmark~=5.1
 pytest-cov~=6.1
 pytest-flake8~=1.3