[maven-release-plugin] prepare release maven-jar-plugin-3.1.0
diff --git a/pom.xml b/pom.xml
index 7adb4c4..316a03b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -19,10 +19,7 @@
   under the License.
 -->
 
-<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">
   <modelVersion>4.0.0</modelVersion>
 
   <parent>
@@ -33,7 +30,7 @@
   </parent>
 
   <artifactId>maven-jar-plugin</artifactId>
-  <version>3.1.0-SNAPSHOT</version>
+  <version>3.1.0</version>
   <packaging>maven-plugin</packaging>
 
   <name>Apache Maven JAR Plugin</name>
@@ -60,7 +57,7 @@
     <connection>scm:git:https://gitbox.apache.org/repos/asf/maven-jar-plugin.git</connection>
     <developerConnection>scm:git:https://gitbox.apache.org/repos/asf/maven-jar-plugin.git</developerConnection>
     <url>https://github.com/apache/maven-jar-plugin/tree/${project.scm.tag}</url>
-    <tag>HEAD</tag>
+    <tag>maven-jar-plugin-3.1.0</tag>
   </scm>
   <issueManagement>
     <system>JIRA</system>