Fix typo and formatting

doc/migrations/4.2.0_5.0.0.md

@@ -1,6 +1,6 @@
 ## DB migrations
 
-The migrations scripts for Postgres, MySQL, MSSQL can be found in the [`priv/migrations`](../../priv/migrations/) directory. Please remember to Provide the existing server domain for the `server` column instead of the localhost.
+The migrations scripts for Postgres, MySQL, MSSQL can be found in the [`priv/migrations`](../../priv/migrations/) directory. Please remember to provide the existing server domain for the `server` column instead of the localhost.
 
 ### Changes in XEPs:
 - `mod_last` 
@@ -26,8 +26,7 @@ The migrations scripts for Postgres, MySQL, MSSQL can be found in the [`priv/mig
 
 ## Hook migrations
 
-- `filter_room_packet` hook uses a map instead of a proplist
-  for the event data information.
+- `filter_room_packet` hook uses a map instead of a proplist for the event data information.
 - `room_send_packet` hook has been removed. Use `filter_room_packet` instead.
 - `filter_room_packet` is called for HostType (was for MucHost).
 - `forget_room` is called for HostType (was for MucHost).
@@ -53,7 +52,6 @@ or metrics reporters as described in [Logging and monitoring](../operation-and-m
 In each endpoint, `host` has been changed to `host_type`.
 This is because the metrics are now collected per host type rather than host.
 
-
 ## Users cache
 
 MongooseIM used to feature a cache to check whether a user exists, that was unavoidably enabled, and had no eviction policy, that is, the cache could continue growing forever. Now, MIM features a module called [`mod_cache_users`](../modules/mod_cache_users) that implements a configurable cache policy, that can be enabled, disabled, and parametrised, per `host_type`. This might not be enabled by default in your configuration, so we recommend you verify your configuration and enable it if needed.