Merge pull request github#6769 from github/docfix-dead-links-in-readme

Fix dead links in README.md

Author: MathiasVP

README.md

@@ -4,8 +4,8 @@ This open source repository contains the standard CodeQL libraries and queries t
 
 ## How do I learn CodeQL and run queries?
 
-There is [extensive documentation](https://help.semmle.com/QL/learn-ql/) on getting started with writing CodeQL.
-You can use the [interactive query console](https://lgtm.com/help/lgtm/using-query-console) on LGTM.com or the [CodeQL for Visual Studio Code](https://help.semmle.com/codeql/codeql-for-vscode.html) extension to try out your queries on any open source project that's currently being analyzed.
+There is [extensive documentation](https://codeql.github.com/docs/) on getting started with writing CodeQL.
+You can use the [interactive query console](https://lgtm.com/help/lgtm/using-query-console) on LGTM.com or the [CodeQL for Visual Studio Code](https://codeql.github.com/docs/codeql-for-visual-studio-code/) extension to try out your queries on any open source project that's currently being analyzed.
 
 ## Contributing