update changelog for 1.37.0 (#3104)

Author: SylvainJuge

CHANGELOG.asciidoc

@@ -20,8 +20,14 @@ endif::[]
 
 === Unreleased
 
+[[release-notes-1.38.0]]
+==== 1.38.0 - YYYY/MM/DD
+
+[[release-notes-1.x]]
+=== Java Agent version 1.x
+
 [[release-notes-1.37.0]]
-==== 1.37.0 - YYYY/MM/DD
+==== 1.37.0 - 2023/04/11
 
 [float]
 ===== Potentially breaking changes
@@ -55,9 +61,6 @@ communication - {pull}2996[#2996]
 * Fix security exception when security manager is used with `log_level=debug` - {pull}3077[#3077]
 * Fix slim attacher when downloading agent version - {pull}3096[#3096]
 
-[[release-notes-1.x]]
-=== Java Agent version 1.x
-
 [[release-notes-1.36.0]]
 ==== 1.36.0 - 2023/01/27