Update README

Author: simonespa

README.md

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 # Algorithms & Data structures
 
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+[![CodeQL Advanced](https://github.com/simonespa/algorithms-and-data-structures/actions/workflows/codeql.yml/badge.svg?branch=main)](https://github.com/simonespa/algorithms-and-data-structures/actions/workflows/codeql.yml) [![Dependabot Updates](https://github.com/simonespa/algorithms-and-data-structures/actions/workflows/dependabot/dependabot-updates/badge.svg?branch=main)](https://github.com/simonespa/algorithms-and-data-structures/actions/workflows/dependabot/dependabot-updates)
 
 This repo is an open source collection and playground of algorithms, data structures, coding exercises and related documentation to brush up your knowledge of computer science fundamentals.