docs fix typo in core/logx/readme.md (#3650)

core/logx/readme.md

@@ -40,7 +40,7 @@ type LogConf struct {
 - `Compress`: whether or not to compress log files, only works with `file` mode.
 - `KeepDays`: how many days that the log files are kept, after the given days, the outdated files will be deleted automatically. It has no effect on `console` mode.
 - `StackCooldownMillis`: how many milliseconds to rewrite stacktrace again. It’s used to avoid stacktrace flooding.
-- `MaxBackups`: represents how many backup log files will be kept. 0 means all files will be kept forever. Only take effect when `Rotation` is `size`. NOTE: the level of option `KeepDays` will be higher. Even thougth `MaxBackups` sets 0, log files will still be removed if the `KeepDays` limitation is reached.
+- `MaxBackups`: represents how many backup log files will be kept. 0 means all files will be kept forever. Only take effect when `Rotation` is `size`. NOTE: the level of option `KeepDays` will be higher. Even though `MaxBackups` sets 0, log files will still be removed if the `KeepDays` limitation is reached.
 - `MaxSize`: represents how much space the writing log file takes up. 0 means no limit. The unit is `MB`. Only take effect when `Rotation` is `size`.
 - `Rotation`: represents the type of log rotation rule. Default is `daily`.
   - `daily` rotate the logs by day.