[pom] correct head tag

Author: hazendaz

pom.xml

@@ -53,7 +53,7 @@
         <connection>scm:git:ssh://[email protected]/tomcat-slf4j-logback/tomcat11-slf4j-logback.git</connection>
         <developerConnection>scm:git:ssh://[email protected]/tomcat-slf4j-logback/tomcat11-slf4j-logback.git</developerConnection>
         <url>https://github.com/tomcat-slf4j-logback/tomcat11-slf4j-logback</url>
-        <tag>tomcat11-slf4j-logback-11.0.0-M7</tag>
+        <tag>HEAD</tag>
     </scm>
 
     <properties>