Update pytest requirement from <7.5,>=6.2 to >=6.2,<8.1

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@6.2.0...8.0.0)

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

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

Author: dependabot[bot]

setup.py

@@ -129,7 +129,7 @@
     test_suite="tests",
     tests_require=[
         "bagit >= 1.6.4, < 1.9",
-        "pytest >= 6.2, < 7.5",
+        "pytest >= 6.2, < 8.1",
         "mock >= 2.0.0",
         "pytest-mock >= 1.10.0",
         "pytest-httpserver",

test-requirements.txt

@@ -1,5 +1,5 @@
 bagit>=1.6.4,<1.9
-pytest>=6.2,< 7.5
+pytest>= 6.2,< 8.1
 pytest-xdist
 pytest-httpserver
 mock>=2.0.0