Update rules_gazebo version to 0.0.8

Signed-off-by: Michael Carroll <mjcarroll@intrinsic.ai>

Author: Michael Carroll

MODULE.bazel

@@ -2,7 +2,7 @@
 
 module(
     name = "rules_gazebo",
-    version = "0.0.6",
+    version = "0.0.8",
     compatibility_level = 1,
 )