Rename client submodule

.gitmodules

 [submodule "webpage"]
 	path = webpage
 	url = https://git.scc.kit.edu/feudal/feudalWebpage.git
-[submodule "feudalClient"]
-	path = feudalClient
+[submodule "client"]
+	path = client
 	url = https://git.scc.kit.edu/feudal/feudalClient

client @ dfce6039

+Subproject commit dfce6039cd82e9a4e6f455a7353a590b36485229

feudalClient @ 58fc6dea

-Subproject commit 58fc6deaadd97c91632b204395e10efaf95da3fe