Sphinx does not follow paths for class aliases for parameter types

## Problem
Even though `Algorithm` is an alias for `AlgorithmSuite`, it looks like the sphinx module that generates code links for parameter types doesn't realize that and just treats it as an unknown class.

ex:

render:

https://aws-encryption-sdk-python.readthedocs.io/en/latest/generated/aws_encryption_sdk.html#aws_encryption_sdk.encrypt

src:

https://github.com/aws/aws-encryption-sdk-python/blob/master/src/aws_encryption_sdk/__init__.py#L72-L73

## Solution
Replace parameter type references with `AlgorithmSuite`.

检查 src/aws_encryption_sdk/__init__.py 第 72-73 行中的别名定义，然后将生成的加密文档与其源链接进行比较。跟踪生成参数类型链接的 Sphinx 模块，并验证参数引用解析为 AlgorithmSuite，而不是未知类。

由索引模型根据 Issue 内容生成。