Merge pull request #37 from microsoft/dependabot/pip/docs/cryptography-3.3.2

Bump cryptography from 3.2 to 3.3.2 in /docs

docs/rtd-requirements.txt

@@ -7,7 +7,7 @@ cffi==1.11.5
 chardet==3.0.4
 colorama==0.3.9
 CommonMark==0.5.4
-cryptography==3.2
+cryptography==3.3.2
 docutils==0.14
 idna==2.7
 imagesize==1.1.0