[mana] Change url submodule

.gitmodules

@@ -200,7 +200,7 @@
 	branch = nalc
 [submodule "mana"]
 	path = mana
-	url = https://sys4.fr/gitea/nalc/mana.git
+	url = https://sys4.fr/gitea/nalc/minetest_mana.git
 	branch = nalc
 [submodule "mapfix"]
 	path = mapfix