README: add awesome go badge

fix #335

Author: gucio321

README.md

@@ -1,6 +1,7 @@
 [![Go Report Card](https://goreportcard.com/badge/github.com/AllenDang/cimgui-go)](https://goreportcard.com/report/github.com/AllenDang/cimgui-go)
 ![Build Status](https://github.com/AllenDang/cimgui-go/actions/workflows/build.yml/badge.svg)
 [![GoDoc](https://pkg.go.dev/badge/github.com/AllenDang/cimgui-go?utm_source=godoc)](https://pkg.go.dev/mod/github.com/AllenDang/cimgui-go)
+[![Mentioned in Awesome Go](https://awesome.re/mentioned-badge.svg)](https://github.com/avelino/awesome-go#gui)
 
 # cimgui-go