Fix package name to include version number

Signed-off-by: Addisu Z. Taddese <addisu@openrobotics.org>

Author: azeey

package.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <?xml-model href="http://download.ros.org/schema/package_format2.xsd" schematypens="http://www.w3.org/2001/XMLSchema"?>
 <package format="2">
-  <name>gz-sim</name>
+  <name>gz-sim8</name>
   <version>8.2.0</version>
   <description>Gazebo Sim : A Robotic Simulator</description>
   <maintainer email="mjcarroll@intrinsic.ai">Michael Carroll</maintainer>