Bump pytest from 8.4.2 to 9.0.1 in /demos

Bumps [pytest](https://github.com/pytest-dev/pytest) from 8.4.2 to 9.0.1.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@8.4.2...9.0.1)

---
updated-dependencies:
- dependency-name: pytest
  dependency-version: 9.0.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

demos/blog/requirements.txt

@@ -8,7 +8,7 @@ redis==7.0.1
 SQLalchemy==2.0.44
 
 # testing
-pytest==8.4.2
+pytest==9.0.1
 pytest-aiohttp==1.1.0
 pytest-asyncio==0.26.0
 flake8==7.3.0

demos/graphql-demo/requirements-dev.txt

@@ -12,6 +12,6 @@ redis==7.0.1
 
 mypy==1.18.2
 flake8==7.3.0
-pytest==8.4.2
+pytest==9.0.1
 pytest-cov==7.0.0
 sqlalchemy==2.0.44

demos/moderator/requirements-dev.txt

@@ -12,7 +12,7 @@ flake8-bugbear==24.12.12
 flake8-quotes==3.4.0
 ipdb==0.13.13
 mypy==1.18.2
-pytest==8.4.2
+pytest==9.0.1
 pytest-aiohttp==1.1.0
 pytest-asyncio==0.26.0
 pytest-cov==7.0.0

demos/moderator_bot/requirements-dev.txt

@@ -12,7 +12,7 @@ more-itertools==10.8.0
 multidict==6.7.0
 numpy==2.3.4
 pluggy==1.6.0
-pytest==8.4.2
+pytest==9.0.1
 pytest-aiohttp==1.1.0
 pyyaml==6.0.3
 scikit-learn==1.7.2

demos/polls/requirements-dev.txt

@@ -5,6 +5,6 @@ trafaret_config==2.0.2
 SQLalchemy==2.0.44
 
 # For testing
-pytest==8.4.2
+pytest==9.0.1
 pytest-aiohttp==1.1.0
 flake8==7.3.0