fix(docs): Grammar based on the context

apps/docs/contributing/opening-issues.mdx

@@ -38,7 +38,7 @@ the asynchronous back-and-forth of these questions adds up quite fast, this resu
 
 1. Your actual issue might not actually get fixed
 2. Other people that have the same issue will not get their fix as soon as possible
-3. It will be a lot harder to check if an issue has been fixed or not on a new release
+3. It will be a lot harder to check if the issue has been fixed on a new release
 
 So even though it may feel a bit cumbersome at the moment of opening the issue to make an
 actual reproduction, please do so, because it will be much more beneficial for you,