Bump testcontainers from 4.8.0 to 4.8.1 (#492)

Bumps [testcontainers](https://github.com/testcontainers/testcontainers-python) from 4.8.0 to 4.8.1.
- [Release notes](https://github.com/testcontainers/testcontainers-python/releases)
- [Changelog](https://github.com/testcontainers/testcontainers-python/blob/main/CHANGELOG.md)
- [Commits](testcontainers/testcontainers-python@testcontainers-v4.8.0...testcontainers-v4.8.1)

---
updated-dependencies:
- dependency-name: testcontainers
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

tests/requirements.txt

@@ -1,5 +1,5 @@
 testcontainers==3.7.1; python_version < '3.9'
-testcontainers==4.8.0; python_version >= '3.9'
+testcontainers==4.8.1; python_version >= '3.9'
 pytest
 requests>=2.32
 docker>=7.1.0 # Required to use requests>=2.32