Fix configuration directory location on non-Windows

3e089e4c accidentally switched from
`g_get_user_config_dir()` to `g_get_user_data_dir()` as the location
for the user's configuration directory.

src/utils.c

@@ -2085,6 +2085,6 @@ gchar *utils_get_user_config_dir(void)
 #ifdef G_OS_WIN32
 	return win32_get_user_config_dir();
 #else
-	return g_build_filename(g_get_user_data_dir(), "geany", NULL);
+	return g_build_filename(g_get_user_config_dir(), "geany", NULL);
 #endif
 }