Update README.md (#67)

* Update README.md

* Update README.md

Author: staabm

README.md

@@ -137,13 +137,13 @@ composer require --dev staabm/phpstan-dba
 
 ## Caveats
 
-- running `RecordingQueryReflector` requires in PHPStan-non-debug mode (currently we see concurrency issues while building the cache).
+- running `RecordingQueryReflector` requires running PHPStan with `--debug` (otherwise we see concurrency issues while building the cache).
 
 ## Todos
 
 - support the [phpstan/extension-installer](https://github.com/phpstan/extension-installer)
 - support [more mysql to PHPStan type mappings](https://github.com/staabm/phpstan-dba/blob/b868f40c80afcecd3de408df3801b5a24e220dd8/src/QueryReflection/MysqliQueryReflector.php#L111)
 - cover more real world examples and fine tune the [QueryReflection classes](https://github.com/staabm/phpstan-dba/tree/main/src/QueryReflection)
-- support a PDO based QueryReflector
+- support a PDO based `QueryReflector`
 - security rule: detect possible sql injections
 - performance rule: detect queries not using indexes