added awsome-csirts on Readme.md

[Spacial]

• awsome-csirt by Spacial Awesome-CSIRT is an awesome curated list of links and resources in security and csirt daily activities.

Contributing

(the same measurement rule as awesome-made-by-russians )

It's hard to calculate project popularity so we use stars to measure it. It's not quite fair, but it is what we have here on Github.

If you want to add a project to this list, please make sure that:

• [x] The project was created by the developers born in Brazil
• [x] The project can't be just a personal, experimental or sample project
• [x] The project has more than 100 stars on Github
• [x] Place them in alphabetical order
• [x] One repository per PR/contribution - avoid conflicts and simplify review
• [x] Check if your suggestion follows our pattern (title, description, badge), you need to add double blank space after ending line of each line

If they meet the requirements above, feel free to create a PR! 😁