docs: add direct link to website

To make it easy for users to go to website for more info.

README.md

@@ -1,6 +1,6 @@
 # CodeQL Action
 
-This action runs GitHub's industry-leading semantic code analysis engine, CodeQL, against a repository's source code to find security vulnerabilities. It then automatically uploads the results to GitHub so they can be displayed in the repository's security tab. CodeQL runs an extensible set of [queries](https://github.com/github/codeql), which have been developed by the community and the [GitHub Security Lab](https://securitylab.github.com/) to find common vulnerabilities in your code.
+This action runs GitHub's industry-leading semantic code analysis engine, [CodeQL](https://codeql.github.com/), against a repository's source code to find security vulnerabilities. It then automatically uploads the results to GitHub so they can be displayed in the repository's security tab. CodeQL runs an extensible set of [queries](https://github.com/github/codeql), which have been developed by the community and the [GitHub Security Lab](https://securitylab.github.com/) to find common vulnerabilities in your code.
 
 For a list of recent changes, see the CodeQL Action's [changelog](CHANGELOG.md).