Bump msal from 1.25.0 to 1.28.0 (#806)

Bumps [msal](https://github.com/AzureAD/microsoft-authentication-library-for-python) from 1.25.0 to 1.28.0.
- [Release notes](https://github.com/AzureAD/microsoft-authentication-library-for-python/releases)
- [Commits](AzureAD/microsoft-authentication-library-for-python@1.25.0...1.28.0)

---
updated-dependencies:
- dependency-name: msal
  dependency-type: indirect
...

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Author: dependabot[bot]

requirements.txt

@@ -194,7 +194,7 @@ markupsafe==2.1.3
     # via jinja2
 matplotlib-inline==0.1.6
     # via ipython
-msal==1.25.0
+msal==1.28.0
     # via
     #   azure-identity
     #   msal-extensions