Fix typo in migration/wsc53/php.md

Author: TimWolla

docs/migration/wsc53/php.md

@@ -130,4 +130,4 @@ See [WoltLab/WCF#4064](https://github.com/WoltLab/WCF/pull/4064) and [WoltLab/WC
 ## `Database::prepare()`
 
 `Database::prepare(string $statement, int $limit = 0, int $offset = 0): PreparedStatement` works the same way as `Database::prepareStatement()` but additionally also replaces all occurences of `app1_` with `app{WCF_N}_` for all installed apps.
-This new method makes it superfluous to use `WCF_N` when builiding queries.
+This new method makes it superfluous to use `WCF_N` when building queries.