add domain caniuse for image allowlist (#9378)

Author: lyndaidaii

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

@@ -15,6 +15,7 @@
         "badges.gitter.im",
         "bettercodehub.com",
         "buildstats.info",
+        "caniuse.bitsofco.de",
         "cdn.jsdelivr.net",
         "cdn.syncfusion.com",
         "ci.appveyor.com",