CONTRIBUTING.md: Fix wording

CONTRIBUTING.md

@@ -14,7 +14,7 @@ If you want to report an *issue* with Pico's core, please create a new [Issue](h
 
 Before creating a [new Issue on GitHub](https://github.com/picocms/Pico/issues/new), please make sure the problem wasn't reported yet using [GitHubs search engine](https://github.com/picocms/Pico/search?type=Issues).
 
-Please describe your issue as clear as possible and always include the *Pico version* you're using. Provided that you're using *plugins*, include a list of them too. We need information about the *actual and expected behavior*, the *steps to reproduce* the problem, and what steps have you taken to resolve the problem by yourself (i.e. *your own troubleshooting*)?
+Please describe your issue as clear as possible and always include the *Pico version* you're using. Provided that you're using *plugins*, include a list of them too. We need information about the *actual and expected behavior*, the *steps to reproduce* the problem, and what steps you have taken to resolve the problem by yourself (i.e. *your own troubleshooting*).
 
 Contributing code
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