Merge #3314

3314: quick chinese fix r=def- a=TsFreddie

"Map"

There is a "Map" under the entities background settings making me a bit confused. I translated it as "entities mode background map". Now i changed it back to just "Map"

## Checklist

- [ ] Tested the change ingame
- [ ] Provided screenshots if it is a visual change
- [ ] Tested in combination with possibly related configuration options
- [ ] Written a unit test if it works standalone, system.c especially
- [ ] Considered possible null pointers and out of bounds array indexing
- [ ] Changed no physics that affect existing maps
- [ ] Tested the change with [ASan+UBSan or valgrind's memcheck](https://github.com/ddnet/ddnet/#using-addresssanitizer--undefinedbehavioursanitizer-or-valgrinds-memcheck) (optional)


Co-authored-by: Freddie Wang <tsfreddiewang@gmail.com>

data/languages/simplified_chinese.txt

@@ -256,7 +256,7 @@ MOTD
 == 公告
 
 Map
-== 实体层背景地图
+== 地图
 
 Maximum ping:
 == 最高延迟：

data/languages/traditional_chinese.txt

@@ -250,7 +250,7 @@ MOTD
 == 公告
 
 Map
-== 實體層背景地圖
+== 地圖
 
 Maximum ping:
 == 最高延遲：