[pom] Fix tag back to HEAD

Author: hazendaz

pom.xml

@@ -109,7 +109,7 @@
   <scm>
     <connection>scm:git:ssh://git@github.com/mybatis/mybatis-3.git</connection>
     <developerConnection>scm:git:ssh://git@github.com/mybatis/mybatis-3.git</developerConnection>
-    <tag>mybatis-3.5.15</tag>
+    <tag>HEAD</tag>
     <url>https://github.com/mybatis/mybatis-3</url>
   </scm>
   <issueManagement>