Update pytest requirement from ~=7.4.4 to >=7.4.4,<8.1.0

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@7.4.4...8.0.0)

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

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

pyproject.toml

@@ -33,7 +33,7 @@ zulip = [
     "zulip~=0.9.0"
 ]
 tests = [
-    "pytest~=7.4.4",
+    "pytest>=7.4.4,<8.1.0",
     "types-PyYAML~=6.0.12",
     "mypy~=1.8.0"
 ]