add domain app.fossa.com & cdn.syncfusion.com (#8805)

Author: lyndaidaii

src/NuGetGallery/App_Data/Files/Content/Trusted-Image-Domains.json

@@ -8,12 +8,14 @@
         "api.travis-ci.com",
         "api.travis-ci.org",
         "app.fossa.io",
+        "app.fossa.com",
         "badge.fury.io",
         "badgen.net",
         "badges.gitter.im",
         "bettercodehub.com",
         "buildstats.info",
         "cdn.jsdelivr.net",
+        "cdn.syncfusion.com",
         "ci.appveyor.com",
         "circleci.com",
         "codecov.io",