Merge ddnet#6821

6821: Revert `Наблюдение за` change r=def- a=gerdoe-jr

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## 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 (especially base/) or added coverage to integration test
- [ ] 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: Vlad <[email protected]>

data/languages/russian.txt

@@ -403,7 +403,7 @@ Sound error
 == Ошибка звука
 
 Spectate
-== Наблюдение за
+== Наблюдать
 
 Spectate next
 == Наблюдать за след.