Updated changelog.

See #1701

Author: christophstrobl

src/main/resources/changelog.txt

@@ -1,6 +1,10 @@
 Spring Data Elasticsearch Changelog
 ===================================
 
+Changes in version 4.2.0-M4 (2021-02-18)
+----------------------------------------
+
+
 Changes in version 4.1.5 (2021-02-18)
 -------------------------------------
 
@@ -1523,5 +1527,6 @@ Release Notes - Spring Data Elasticsearch - Version 1.0 M1 (2014-02-07)
 
 
 
+