Update introduction.md (#330)

Changed to singular to match "does"

Author: sandervanhooft

docs/introduction.md

@@ -3,7 +3,7 @@ title: Introduction
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-Do you use Kafka in your laravel projects? All packages I've seen until today, including some built by myself, does not provide a nice syntax usage syntax or, when it does, the test process with these packages are very painful.
+Do you use Kafka in your laravel projects? Every package I've seen until today, including some built by myself, does not provide a nice syntax usage syntax or, when it does, the test process with these packages are very painful.
 
 This package provides a nice way of producing and consuming kafka messages in your Laravel projects.