Update pytest requirement from ==7.* to >=7,<9

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@7.0.0rc1...8.0.0)

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

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

pyproject.toml

@@ -62,7 +62,7 @@ dynamic = ["version"]
 [project.optional-dependencies]
 test = [
     "mock == 5.*",
-    "pytest == 7.*",
+    "pytest >= 7,< 9",
     "pytest-cov",
     "pytest-asyncio",
 ]

tests/requirements_for_software_tests.txt

@@ -1,4 +1,4 @@
 mock==5.*
-pytest==7.*
+pytest>=7,<9
 pytest-cov==4.*
 pytest-asyncio>=0.17.2