Bump cryptography from 42.0.2 to 42.0.4 in /tools/mkdocs

Bumps [cryptography](https://github.com/pyca/cryptography) from 42.0.2 to 42.0.4.
- [Changelog](https://github.com/pyca/cryptography/blob/main/CHANGELOG.rst)
- [Commits](https://github.com/pyca/cryptography/compare/42.0.2...42.0.4)

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

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

tools/mkdocs/requirements.txt

@@ -5,7 +5,7 @@ cffi==1.16.0
 charset-normalizer==3.3.2
 click==8.1.7
 colorama==0.4.6
-cryptography==42.0.2
+cryptography==42.0.4
 Deprecated==1.2.14
 ghp-import==2.1.0
 gitdb==4.0.11