Bump msal-extensions from 1.2.0 to 1.3.1 (#2463)

Bumps [msal-extensions](https://github.com/AzureAD/microsoft-authentication-extensions-for-python) from 1.2.0 to 1.3.1.
- [Release notes](https://github.com/AzureAD/microsoft-authentication-extensions-for-python/releases)
- [Commits](AzureAD/microsoft-authentication-extensions-for-python@1.2.0...1.3.1)

---
updated-dependencies:
- dependency-name: msal-extensions
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

app/backend/requirements.txt

@@ -188,7 +188,7 @@ msal==1.30.0
     #   -r requirements.in
     #   azure-identity
     #   msal-extensions
-msal-extensions==1.2.0
+msal-extensions==1.3.1
     # via azure-identity
 msgraph-core==1.3.3
     # via msgraph-sdk