Post to RSS Apostrophes showing up as code

I am using the post to RSS function to get the RSS feed to a social media posting program. The problem that I am having is that the apostrophes are showing up like this: "Group’s". When you look at the RSS feed in a browser that is how they are showing up. I wanted to know if there is anywhere in the settings to tag it to use html or remove those so that when my program posts to social media it doesn't look like this: Here is one of the RSS Feeds that is doing it: http://gemstatemodern.idahominute.com/feed/