Update README.md

Author: iluwatar

README.md

@@ -260,10 +260,9 @@ The difference is the intent of the patterns. While Proxy controls access to the
 # How to contribute
 
 For a new pattern to be added you need to do the following steps:
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 1. Fork the repository.
 2. Implement the code changes in your fork. Remember to add sufficient comments documenting the implementation.
 3. Create a simple class diagram from your example code. I've used [GenMyModel](https://www.genmymodel.com/) and its "Export as JPEG" feature.
 4. Add description of the pattern in README.md and link to the class diagram.
 5. Create a pull request.
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