chore(deps): bump cryptography in /kms/attestations (GoogleCloudPlatform#11216)

Bumps [cryptography](https://github.com/pyca/cryptography) from 41.0.6 to 42.0.2.
- [Changelog](https://github.com/pyca/cryptography/blob/main/CHANGELOG.rst)
- [Commits](pyca/cryptography@41.0.6...42.0.2)

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

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

Author: dependabot[bot]

kms/attestations/requirements.txt

@@ -1,4 +1,4 @@
-cryptography==41.0.6
+cryptography==42.0.2
 pem==21.2.0; python_version < '3.8'
 pem==23.1.0; python_version > '3.7'
 requests==2.31.0