Fixed typo in doc

Author: Geolim4

docs/migration/MigratingFromV5ToV6.md

@@ -231,7 +231,7 @@ In the V5 the driver was making use of of the [deprecated class Mongo](http://ph
 
 #### :alarm_clock: Now:
 In the V6 we made an important change: We now make use of [Mongodb Driver](http://php.net/manual/fr/set.mongodb.php)
-Only your code configuration will have to be updated, PhpFastCache manages all the abstract couch by itself.
+Only your code configuration will have to be updated, PhpFastCache manages all the abstract part by itself.
 
 ### DriverStatistic class name has changed
 :warning: As of the V6, DriverStatistic class name has changed for a better classes name normalization