[maven-release-plugin] prepare release jackson-module-kotlin-2.12.1

pom.xml

@@ -1,5 +1,4 @@
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <!-- This module was also published with a richer model, Gradle metadata,  -->
     <!-- which should be used instead. Do not delete the following line which  -->
     <!-- is to indicate to Gradle or any Gradle module metadata file consumer  -->
@@ -14,7 +13,7 @@
     <groupId>com.fasterxml.jackson.module</groupId>
     <artifactId>jackson-module-kotlin</artifactId>
     <name>jackson-module-kotlin</name>
-    <version>2.12.1-SNAPSHOT</version>
+    <version>2.12.1</version>
     <packaging>bundle</packaging>
     <description>Add-on module for Jackson (https://github.com/FasterXML/jackson/) to support
         Kotlin language, specifically introspection of method/constructor parameter names,
@@ -43,7 +42,7 @@
         <connection>scm:git:[email protected]:FasterXML/jackson-module-kotlin.git</connection>
         <developerConnection>scm:git:[email protected]:FasterXML/jackson-module-kotlin.git</developerConnection>
         <url>https://github.com/FasterXML/jackson-module-kotlin</url>
-        <tag>HEAD</tag>
+        <tag>jackson-module-kotlin-2.12.1</tag>
     </scm>
 
     <properties>