Correct simple grammar mistake

Updated simple grammar mistake from "you" to "your".

Author: PopWarner

docs/spfx/publish-to-marketplace-checklist.md

@@ -37,7 +37,7 @@ Under normal circumstances, all components (web parts and extensions) in your so
 
 ### Web part should work in all hosts in which it is exposed
 
-When building web parts using SharePoint Framework, you can choose [where they should be exposed](integrate-with-teams-introduction.md). Before submitting you application for review, ensure that your web part works as intended in all these hosts.
+When building web parts using SharePoint Framework, you can choose [where they should be exposed](integrate-with-teams-introduction.md). Before submitting your application for review, ensure that your web part works as intended in all these hosts.
 
 ### Solution package must contain valid developer metadata