add a new AWS CDK Python Examples link into the list of sample codes

[ksmin23]

AWS CDK Python Examples for Frequently Used AWS Services is a collection of AWS CDK Python examples with architecture diagrams for frequently used AWS services.

AWS CDK Javascript or Typescript examples can be easily found, but it is not for AWS CDK Python examples. Particlualry, Official CDK examples do not have architecture diagrams. So, I have made 70+ CDK projects with architecture diagrams in this repository. I hope it will be helpful to people to learn and enjoy AWS CDK.

Requirements for your pull request

• Use the following format: [library](link) - Description.
• The text of the link should be the name of the package or project.
• If you add a construct published in multiple languages via JSII, the link should point to the source repository, not to npm, PyPI etc
• Add one link per pull-request.
• Keep descriptions concise, clear and simple, and end them with a period / stop.
• New categories, or improvements to the existing ones are also welcome.
• Make sure your text editor is set to remove trailing whitespace.
• It is desirable for the whole thing to fit on one line after getting rendered by GitHub.