Explicitly dispose ImageSharp images.

Content.Client/Parallax/ParallaxGenerator.cs

@@ -320,8 +320,8 @@ namespace Content.Client.Parallax
             public override void Apply(Image<Rgba32> bitmap)
             {
                 // Temporary buffer so we don't mess up blending.
-                var buffer = new Image<Rgba32>(Configuration.Default, bitmap.Width, bitmap.Height, Rgba32.Black);
-
+                using (var buffer = new Image<Rgba32>(Configuration.Default, bitmap.Width, bitmap.Height, Rgba32.Black))
+                {
                     if (Masked)
                     {
                         GenPointsMasked(buffer);
@@ -350,6 +350,7 @@ namespace Content.Client.Parallax
                         }
                     }
                 }
+            }
 
             private void GenPoints(Image<Rgba32> buffer)
             {

Content.Client/Parallax/ParallaxManager.cs

@@ -96,6 +96,8 @@ namespace Content.Client.Parallax
                 image.SaveAsPng(stream);
             }
 
+            image.Dispose();
+
             using (var stream = _resourceCache.UserData.Open(ParallaxConfigOld, FileMode.Create))
             using (var writer = new StreamWriter(stream, EncodingHelpers.UTF8))
             {