Python: Apply suggestions from code review

Co-authored-by: yoff <lerchedahl@gmail.com>

Author: RasmusWL

python/ql/src/semmle/python/frameworks/Cryptodome.qll

@@ -148,7 +148,7 @@ private module CryptodomeModel {
       result in [this.getArg(0), this.getArgByName("plaintext")]
       or
       methodName in ["decrypt_and_verify"] and
-      result in [this.getArg(0), this.getArgByName("ciphertext")]
+      result in [this.getArg(0), this.getArgByName("ciphertext"), this.getArg(1), this.getArgByName("mac_tag")]
     }
   }
 

python/ql/test/library-tests/frameworks/crypto/README.md

@@ -6,7 +6,7 @@ You can run the following command to update the tests:
 rm *.py && cp ../cryptodome/*.py . && sed -i -e 's/Cryptodome/Crypto/' *.py
 ```
 
-The original [`pycrypto` PyPI package](https://pypi.org/project/pycrypto/) that provided the `Crypto` Python package has not been updated since 2013, so it is reasonable to assume that people will use the replacement [`pycryptodome` PyPI package](https://pypi.org/project/pycryptodome/) that has a (mostly) compatible API.
+The original [`pycrypto` PyPI package](https://pypi.org/project/pycrypto/) that provided the `Crypto` Python package has not been updated since 2013, so it is reasonable to assume that people will use the replacement [`pycryptodome` PyPI package](https://pypi.org/project/pycryptodome/) that also provides a `Crypto` Python package and has a (mostly) compatible API.
 
 The pycryptodome functionality is also available in the [`pycryptodomex` PyPI package](https://pypi.org/project/pycryptodomex/) which provides the `Cryptodome` Python package.