Update README.md

Author: RobProductions

README.md

@@ -1,4 +1,6 @@
 # OpenGraphGUI
+[![openupm](https://img.shields.io/npm/v/com.robproductions.opengraphgui?label=openupm&registry_uri=https://package.openupm.com)](https://openupm.com/packages/com.robproductions.opengraphgui/) ![GitHub release (latest by date)](https://img.shields.io/github/v/release/RobProductions/OpenGraphGUI?logo=github)
+
 An open-source Editor GUI for use with URP ShaderGraphs in Unity, aiming to clean up the look of Material Properties while providing ease-of-use via tagging.
 
 ### Custom GUI right from ShaderGraph
@@ -112,4 +114,4 @@ In theory **OpenGraphGUI** should work with regular Shaders and even HDRP Shader
 
 This work is licensed under the MIT License. The intent for this software is to expand the extend the functionality of ShaderGraph freely and openly, without requirement of attribution. The code may be considered "open source" and could include snippets from multiple collaborators. Contributors may be named in the README.md and Documentation files. 
 
-The code is provided "as is" and without warranty. 
+The code is provided "as is" and without warranty.