chore(deps): update cryptography requirement from >=47.0.0 to >=48.0.0

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](https://github.com/pyca/cryptography/compare/47.0.0...48.0.0)

---
updated-dependencies:
- dependency-name: cryptography
  dependency-version: 48.0.0
  dependency-type: direct:production
...

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

requirements.txt

@@ -1,4 +1,4 @@
 aiohttp>=3.13.5
 bleak>=0.17.0
 bleak-retry-connector>=4.6.0
-cryptography>=47.0.0
+cryptography>=48.0.0

requirements_dev.txt

@@ -3,4 +3,4 @@ pytest-cov
 aiohttp>=3.13.5
 bleak>=0.17.0
 bleak-retry-connector>=4.6.0
-cryptography>=47.0.0
+cryptography>=48.0.0