Fix tests

tests/Jellyfin.Model.Tests/Net/MimeTypesTests.cs

@@ -127,9 +127,10 @@ namespace Jellyfin.Model.Tests.Net
         [InlineData("image/jpeg", ".jpg")]
         [InlineData("image/png", ".png")]
         [InlineData("image/svg+xml", ".svg")]
-        [InlineData("image/tiff", ".tif")]
+        [InlineData("image/tiff", ".tiff")]
         [InlineData("image/vnd.microsoft.icon", ".ico")]
         [InlineData("image/webp", ".webp")]
+        [InlineData("image/x-icon", ".ico")]
         [InlineData("image/x-png", ".png")]
         [InlineData("text/css", ".css")]
         [InlineData("text/csv", ".csv")]