docs: Remove reference to v1 from docs

Author: pgrzesik

README.md

@@ -5,7 +5,7 @@
 [![npm](https://img.shields.io/npm/v/serverless-python-requirements.svg)](https://www.npmjs.com/package/serverless-python-requirements)
 [![code style: prettier](https://img.shields.io/badge/code_style-prettier-ff69b4.svg)](https://github.com/prettier/prettier)
 
-A Serverless v1.x plugin to automatically bundle dependencies from `requirements.txt` and make them available in your `PYTHONPATH`.
+A Serverless Framework plugin to automatically bundle dependencies from `requirements.txt` and make them available in your `PYTHONPATH`.
 
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