Fixed typos in CONTRIBUTOR_GUIDE (#2174)

Co-authored-by: thomashondema <thomas.hondema@icepay.com>

.github/CONTRIBUTOR_GUIDE/json/AppName.json

@@ -12,7 +12,7 @@
     "documentation": null,
     "website": "LINK TO WEBSITE",
     "logo": "LINK TO LOGO",
-    "description": "Deescription of the app",
+    "description": "Description of the app",
     "install_methods": [
         {
             "type": "default",