Bump requests from 2.28.0 to 2.28.1 in /demo/graphtutorial

Bumps [requests](https://github.com/psf/requests) from 2.28.0 to 2.28.1.
- [Release notes](https://github.com/psf/requests/releases)
- [Changelog](https://github.com/psf/requests/blob/main/HISTORY.md)
- [Commits](psf/requests@v2.28.0...v2.28.1)

---
updated-dependencies:
- dependency-name: requests
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

demo/graphtutorial/requirements.txt

@@ -11,7 +11,7 @@ msgraph-core==0.2.2
 portalocker==2.4.0
 pycparser==2.21
 PyJWT==2.4.0
-requests==2.28.0
+requests==2.28.1
 six==1.16.0
 typing_extensions==4.2.0
 urllib3==1.26.9