Revert "Drop CodeQL"

This reverts commit 9e7115f.

README.md

@@ -47,6 +47,7 @@ Apache Commons Collections
 [![Coverage Status](https://codecov.io/gh/apache/commons-collections/branch/master/graph/badge.svg)](https://app.codecov.io/gh/apache/commons-collections)
 [![Maven Central](https://maven-badges.herokuapp.com/maven-central/org.apache.commons/commons-collections4/badge.svg?gav=true)](https://maven-badges.herokuapp.com/maven-central/org.apache.commons/commons-collections4/?gav=true)
 [![Javadocs](https://javadoc.io/badge/org.apache.commons/commons-collections4/4.5.0-M2.svg)](https://javadoc.io/doc/org.apache.commons/commons-collections4/4.5.0-M2)
+[![CodeQL](https://github.com/apache/commons-collections/actions/workflows/codeql-analysis.yml/badge.svg)](https://github.com/apache/commons-collections/actions/workflows/codeql-analysis.yml)
 [![OpenSSF Scorecard](https://api.securityscorecards.dev/projects/github.com/apache/commons-collections/badge)](https://api.securityscorecards.dev/projects/github.com/apache/commons-collections)
 
 The Apache Commons Collections package contains types that extend and augment the Java Collections Framework.