Improvements to erlang docs

[onno-vos-dev]

• Ensure <code> tags that contain references to AWS SDK GO functions are ignored as they blow up ex_doc
• Improve links and ensure more links are rendered in the docs

Example OLD:

%% To verify that all parts have been removed and prevent getting charged for
%% the part storage, you should call the ListParts API operation and ensure
%% that the parts list is empty.

Example NEW:

%% To verify that all parts have been removed and prevent getting charged for
%% the part storage, you should call the ListParts:
%% https://docs.aws.amazon.com/AmazonS3/latest/API/API_ListParts.html API
%% operation and ensure that the parts list is empty.

[onno-vos-dev]

Merging considering we've had two aws-erlang releases with no docs on hex.pm and I'd like to fix that right away

[jadeallenx]

Thank you for fixing this

[onno-vos-dev]

@jadeallenx While it fixed the failure to generate docs, aws-erlang generates so much docs hex.pm refuses to accept the tarball we send it 🤦‍♂️ I'll look at that tomorrow and see what to do about that 👌