Fixed indents in Czech localization cs.yml

When we use this library via CocoaPods it crashes at:
file `MTFakerHelper.m`
method `+ (NSDictionary*)translations`
line 31 `[translationsDictionary setObject: [dictionary objectForKey:key] forKey:key]` (trying to insert nil)
while parsing `cs.yml`.

There is an error in indents. This fix it.