Grammar update in Outside collaborators section

Small grammar update to Outside collaborators section to indicate possession by adding 's to "organization."  I believe instead of "To keep your organization data secure..." it should be "To keep your organization's data secure...."

Author: mirlenbrink

content/github/setting-up-and-managing-organizations-and-teams/permission-levels-for-an-organization.md

@@ -131,7 +131,7 @@ When you designate a user as a {% data variables.product.prodname_github_app %}
 
 ### Outside collaborators
 
-To keep your organization data secure while allowing access to repositories, you can add *outside collaborators*. {% data reusables.organizations.outside_collaborators_description %}
+To keep your organization's data secure while allowing access to repositories, you can add *outside collaborators*. {% data reusables.organizations.outside_collaborators_description %}
 
 ### Further reading