[maven-release-plugin] prepare for next development iteration

pom.xml

@@ -4,7 +4,7 @@
 
   <groupId>org.openrs2</groupId>
   <artifactId>openrs2-parent</artifactId>
-  <version>1.1.0</version>
+  <version>1.1.1-SNAPSHOT</version>
   <packaging>pom</packaging>
 
   <name>OpenRS2 Parent</name>
@@ -26,7 +26,7 @@
     <connection>scm:git:https://git.openrs2.org/openrs2/openrs2-parent.git</connection>
     <developerConnection>scm:git:git@git.openrs2.org:openrs2/openrs2-parent.git</developerConnection>
     <url>https://git.openrs2.org/openrs2/openrs2-parent</url>
-    <tag>v1.1.0</tag>
+    <tag>HEAD</tag>
   </scm>
   <issueManagement>
     <system>Gitea</system>