Bump cryptography from 41.0.4 to 41.0.6 (#341)

Bumps [cryptography](https://github.com/pyca/cryptography) from 41.0.4 to 41.0.6.
- [Changelog](https://github.com/pyca/cryptography/blob/main/CHANGELOG.rst)
- [Commits](pyca/cryptography@41.0.4...41.0.6)

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

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

requirements-dev.txt

@@ -10,7 +10,7 @@ cffi==1.14.2
 chardet==3.0.4
 colorama==0.4.3
 colour==0.1.5
-cryptography==41.0.4
+cryptography==41.0.6
 decorator==4.4.2
 docopt==0.6.2
 docutils==0.15.2