Update .gitmodules (#6)

Author: danjoa

.gitmodules

@@ -16,6 +16,6 @@
 [submodule "common"]
 	path = common
 	url = https://github.com/capire/common
-[submodule "etc/data-viewer"]
+[submodule "data-viewer"]
 	path = inspectr
 	url = https://github.com/capire/data-viewer