Python dependency: Update cryptography requirement

Updates the requirements on [cryptography](https://github.com/pyca/cryptography) to permit the latest version.
- [Changelog](https://github.com/pyca/cryptography/blob/main/CHANGELOG.rst)
- [Commits](pyca/cryptography@47.0.0...48.0.0)

---
updated-dependencies:
- dependency-name: cryptography
  dependency-version: 47.0.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements.txt

@@ -21,7 +21,7 @@ azure-mgmt-subscription==3.1.1
 bcrypt==5.0.*
 boto3==1.43.*
 certifi==2026.4.22
-cryptography==47.0.*
+cryptography==48.0.*
 Flask-Babel==4.0.*
 Flask-Compress==1.*
 Flask-Login==0.*