Prepare for 2.15.4 release

Author: cowtowncoder

pom.xml

@@ -3,7 +3,7 @@
   <parent>
     <groupId>com.fasterxml.jackson</groupId>
     <artifactId>jackson-base</artifactId>
-    <version>2.15.4-SNAPSHOT</version>
+    <version>2.15.4</version>
   </parent>
   <groupId>com.fasterxml.jackson.datatype</groupId>
   <artifactId>jackson-datatypes-misc-parent</artifactId>

release-notes/VERSION-2.x

@@ -10,7 +10,7 @@ Modules:
 === Releases ===
 ------------------------------------------------------------------------
 
-Not yet released:
+2.15.4 (15-Feb-2024)
 
 - Upgrade `org.json:json`` dependency to 20231013 (from 20230227)