add changelog entry

Author: JuditKnoll

CHANGELOG.md

@@ -46,6 +46,7 @@ Currently the versioning policy of this project follows [Semantic Versioning v2.
 - Use diamond operator in constructor calls of Collections ([#3176](https://github.com/spotbugs/spotbugs/pull/3176))
 - Use `Collection.isEmpty()` to test for emptiness ([#3180](https://github.com/spotbugs/spotbugs/pull/3180))
 - Use method references instead of lambdas where possible ([#3179](https://github.com/spotbugs/spotbugs/pull/3179))
+- Use `Boolean.parseBoolean()` for string-to-boolean conversion. ([#3217](https://github.com/spotbugs/spotbugs/pull/3217))
 
 ### Changed
 - Bump up Java version to 11