dependabot: bump pytest from 8.3.4 to 9.1.1

Bumps [pytest](https://github.com/pytest-dev/pytest) from 8.3.4 to 9.1.1.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@8.3.4...9.1.1)

---
updated-dependencies:
- dependency-name: pytest
  dependency-version: 9.1.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

pyproject.toml

@@ -31,7 +31,7 @@ dependencies = [
 
 [project.optional-dependencies]
 dev = [
-    "pytest==8.3.5",
+    "pytest==9.1.1",
     "flake8==7.3.0",
     "black==26.3.1",
     "isort==5.13.2",

requirements.txt

@@ -6,7 +6,7 @@ rich==15.0.0
 tiktoken==0.13.0
 PyYAML==6.0.3
 gitpython==3.1.50
-pytest==8.3.4
+pytest==9.1.1
 textual>=7.5.0
 networkx==3.6.1
 transitions==0.9.3