Prep for 2.21.6 release

Author: cowtowncoder

pom.xml

@@ -4,7 +4,7 @@
   <parent>
     <groupId>com.fasterxml.jackson</groupId>
     <artifactId>jackson-base</artifactId>
-    <version>2.21.6-SNAPSHOT</version>
+    <version>2.21.6</version>
   </parent>
   <groupId>com.fasterxml.jackson.dataformat</groupId>
   <artifactId>jackson-dataformats-binary</artifactId>

release-notes/VERSION-2.x

@@ -14,7 +14,7 @@ Active maintainers:
 === Releases ===
 ------------------------------------------------------------------------
 
-2.21.6 (not yet released)
+2.21.6 (14-Aug-2026)
 
 #708: (protobuf) proto3 label-less field declarations fail to parse
 #712: (protobuf) `map` type not supported with protobuf: should be supported