Merge pull request #461 from gprMax/dependabot/pip/cryptography-43.0.1

Bump cryptography from 42.0.5 to 43.0.1

requirements.txt

@@ -16,7 +16,7 @@ click==8.1.7
 colorama==0.4.6
 comm==0.2.2
 contourpy==1.2.0
-cryptography==42.0.5
+cryptography==43.0.1
 cycler==0.12.1
 Cython==3.0.9
 debugpy==1.8.1