Update README.md

Author: mattleibow

README.md

@@ -63,6 +63,15 @@ However, these are easy to install as they are found on the various websites. If
  - To get started building, [go here](https://github.com/mono/SkiaSharp/wiki/Building-SkiaSharp).
  - If you are just wanting a custom Linux build, [go here](https://github.com/mono/SkiaSharp/wiki/Building-on-Linux)
 
+## Contributors
+
+<a href="https://github.com/mono/SkiaSharp/graphs/contributors">
+  <img src="https://contrib.rocks/image?repo=mono/SkiaSharp" />
+</a>
+
+
+Made with [contrib.rocks](https://contrib.rocks).
+
 ## Compare Code
 
 Here are some links to show the differences in our code as compared to Google's code.