fix submodule access

.gitmodules

@@ -1,6 +1,6 @@
 [submodule "nginx"]
 	path = nginx
-	url = git@github.com:lesspass/nginx.git
+	url = https://github.com/lesspass/nginx.git
 [submodule "backend"]
 	path = backend
-	url = git@github.com:lesspass/api.git
+	url = https://github.com/lesspass/api.git