Spelling mistake, line 87.

Fixed spelling mistake on line 87: you --> Your.

That's it.

In addition, the grammar checker tool states that commas may be used for better clarity in multiple places.

worksheets/worksheet1/worksheet1.md

@@ -84,5 +84,5 @@ This is described in the **'Git Submissions'** resource [here](https://blackboar
 - Clone your newly forked example project
 
 - Add some text to the example.txt file
-- Push your changes so they are visible in you Gitlab project.
+- Push your changes so they are visible in your Gitlab project.