Bump msal from 1.19.0 to 1.20.0 in /demo/graphtutorial

Bumps [msal](https://github.com/AzureAD/microsoft-authentication-library-for-python) from 1.19.0 to 1.20.0.
- [Release notes](https://github.com/AzureAD/microsoft-authentication-library-for-python/releases)
- [Commits](AzureAD/microsoft-authentication-library-for-python@1.19.0...1.20.0)

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

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

Author: dependabot[bot]

demo/graphtutorial/requirements.txt

@@ -5,7 +5,7 @@ cffi==1.15.1
 charset-normalizer==2.1.1
 cryptography==37.0.4
 idna==3.4
-msal==1.19.0
+msal==1.20.0
 msal-extensions==1.0.0
 msgraph-core==0.2.2
 portalocker==2.5.1