Readme.md update java8 target version

Updating the targeted esapi version for the java8 update in the
Readme.md

Author: jeremiahjstacey

Diff for: README.md

@@ -29,7 +29,7 @@ You will find that GitHub repository at [https://github.com/ESAPI/esapi-java-leg
 <b>IMPORTANT NOTES:</b>
 The default branch for ESAPI legacy is now the 'develop' branch (rather than the 'main' (formerly 'master') branch), where future development, bug fixes, etc. will now be done. The 'main' branch is now marked as "protected"; it reflects the latest stable ESAPI release (2.1.0.1 as of this date). Note that this change of making the 'develop' branch the default may affect any pull requests that you were intending to make.
 
-Also, the <i>minimal</i> baseline Java version to use ESAPI is Java 8. (This was changed from Java 7 during the 2.2.3.2 release.)
+Also, the <i>minimal</i> baseline Java version to use ESAPI is Java 8. (This was changed from Java 7 during the 2.4.0.0 release.)
 
 # Where can I find ESAPI 3.x?
 [https://github.com/ESAPI/esapi-java](https://github.com/ESAPI/esapi-java)