[maven-release-plugin] prepare release v1.28.0

Author: lanwen-ci

pom.xml

@@ -6,12 +6,12 @@
         <groupId>org.jenkins-ci.plugins</groupId>
         <artifactId>plugin</artifactId>
         <version>2.6</version>
-        <relativePath/>
+        <relativePath />
     </parent>
 
     <groupId>com.coravy.hudson.plugins.github</groupId>
     <artifactId>github</artifactId>
-    <version>1.28.0-SNAPSHOT</version>
+    <version>1.28.0</version>
     <packaging>hpi</packaging>
 
     <name>GitHub plugin</name>
@@ -39,7 +39,7 @@
         <connection>scm:git:git://github.com/jenkinsci/github-plugin.git</connection>
         <developerConnection>scm:git:git@github.com:jenkinsci/github-plugin.git</developerConnection>
         <url>https://github.com/jenkinsci/github-plugin</url>
-        <tag>HEAD</tag>
+        <tag>v1.28.0</tag>
     </scm>
     <issueManagement>
         <system>JIRA</system>