Merge pull request #17896 from umbraco/v15/bugfix/support-svg-in-thumbnail-endpoint

v15: Support SVGs in thumbnail endpoint

src/Umbraco.Cms.Api.Management/Factories/ReziseImageUrlFactory.cs

@@ -46,6 +46,16 @@ public class ReziseImageUrlFactory : IReziseImageUrlFactory
             var extension = Path.GetExtension(url).Remove(0, 1);
             if (_imageUrlGenerator.SupportedImageFileTypes.InvariantContains(extension) is false)
             {
+                // It's okay to return just the image URL for SVGs, as they are always scalable.
+                if (extension == "svg")
+                {
+                    yield return new MediaUrlInfo
+                    {
+                        Culture = null,
+                        Url = _absoluteUrlBuilder.ToAbsoluteUrl(url).ToString(),
+                    };
+                }
+
                 continue;
             }