Bump azure-identity from 1.11.0 to 1.12.0 in /demo/graphtutorial

Bumps [azure-identity](https://github.com/Azure/azure-sdk-for-python) from 1.11.0 to 1.12.0.
- [Release notes](https://github.com/Azure/azure-sdk-for-python/releases)
- [Commits](Azure/azure-sdk-for-python@azure-identity_1.11.0...azure-identity_1.12.0)

---
updated-dependencies:
- dependency-name: azure-identity
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

demo/graphtutorial/requirements.txt

@@ -1,5 +1,5 @@
 azure-core==1.26.1
-azure-identity==1.11.0
+azure-identity==1.12.0
 certifi==2022.9.24
 cffi==1.15.1
 charset-normalizer==2.1.1