POM: rename artifactId to match repository name

Using 'imglib2-' instead of 'imglib-' also better matches other Jug Lab
projects, including imglib2-labkit and imglib2-trainable-segmentation.

Author: ctrueden

pom.xml

@@ -10,7 +10,7 @@
 	</parent>
 
 	<groupId>sc.fiji</groupId>
-	<artifactId>imglib-clearvolume</artifactId>
+	<artifactId>imglib2-clearvolume</artifactId>
 	<version>1.4.3-SNAPSHOT</version>
 
 	<name>ClearVolume ImageJ plugins</name>