Bump azure-core from 1.25.0 to 1.25.1 in /demo/graphtutorial

Bumps [azure-core](https://github.com/Azure/azure-sdk-for-python) from 1.25.0 to 1.25.1.
- [Release notes](https://github.com/Azure/azure-sdk-for-python/releases)
- [Commits](Azure/azure-sdk-for-python@azure-core_1.25.0...azure-core_1.25.1)

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

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

Author: dependabot[bot]

demo/graphtutorial/requirements.txt

@@ -1,4 +1,4 @@
-azure-core==1.25.0
+azure-core==1.25.1
 azure-identity==1.10.0
 certifi==2022.6.15
 cffi==1.15.1