Update changelog

src/site/markdown/overview/changelog.md

@@ -46,6 +46,7 @@
 *   [#139](https://github.com/pmd/pmd/pull/139): \[java] Tiny improvements and code tidy up
 *   [#140](https://github.com/pmd/pmd/pull/140): \[java] Make CloneMethodMustImplementCloneable over 500x faster
 *   [#141](https://github.com/pmd/pmd/pull/141): \[java] Speedup PreserveStackTraceRule by over 7X
+*   [#143](https://github.com/pmd/pmd/pull/143): \[core] Add documentation on analysis cache usage
 *   [#146](https://github.com/pmd/pmd/pull/146): \[apex] Detection of missing Apex CRUD checks for SOQL/DML operations
 *   [#147](https://github.com/pmd/pmd/pull/147): \[apex] Adding XSS detection to return statements
 *   [#148](https://github.com/pmd/pmd/pull/148): \[apex] Improving detection of SOQL injection