Prepare for 2.15.4 release

Author: cowtowncoder

pom.xml

@@ -8,7 +8,7 @@
     <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.module</groupId>
     <artifactId>jackson-module-kotlin</artifactId>

release-notes/VERSION-2.x

@@ -16,6 +16,7 @@ Co-maintainers:
 === Releases ===
 ------------------------------------------------------------------------
 
+2.15.4 (15-Feb-2024)
 2.15.3 (12-Oct-2023)
 
 No changes since 2.15.2