Fix `AssemblyDescriptorResolver` assembly matching (#15506)

* Fix `AssemblyDescriptorResolver` assembly matching

* Update src/Avalonia.Base/Platform/Internal/AssemblyDescriptorResolver.cs

* Update AssemblyDescriptorResolver.cs

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Co-authored-by: Max Katz <maxkatz6@outlook.com>

src/Avalonia.Base/Platform/Internal/AssemblyDescriptorResolver.cs

@@ -26,7 +26,7 @@ internal class AssemblyDescriptorResolver: IAssemblyDescriptorResolver
         if (!_assemblyNameCache.TryGetValue(name, out var rv))
         {
             var loadedAssemblies = AppDomain.CurrentDomain.GetAssemblies();
-            var match = loadedAssemblies.FirstOrDefault(a => a.GetName().Name == name);
+            var match = loadedAssemblies.FirstOrDefault(a => name.Equals(a.GetName().Name, StringComparison.InvariantCultureIgnoreCase));
             if (match != null)
             {
                 _assemblyNameCache[name] = rv = new AssemblyDescriptor(match);