Add CI badges to readme documentation and Fix pipeline trigger issue (#9

)

* Add CI badges to readme doc

* Fix pipeline trigger issue

.github/workflows/build.yml

@@ -2,9 +2,9 @@ name: Build
 
 on:
   push:
-    branches: [main]
+    branches: [master]
   pull_request:
-    branches: [main]
+    branches: [master]
 
 jobs:
   build:

README.md

@@ -1,6 +1,9 @@
 # go-weasyprint
 
 [![Go Reference](https://pkg.go.dev/badge/github.com/benoitkugler/go-weasyprint.svg)](https://pkg.go.dev/github.com/benoitkugler/go-weasyprint)
+[![Build Status](https://github.com/benoitkugler/go-weasyprint/actions/workflows/build.yml/badge.svg)](https://github.com/benoitkugler/go-weasyprint/actions/workflows/build.yml)
+[![Go Report Card](https://goreportcard.com/badge/github.com/benoitkugler/go-weasyprint)](https://goreportcard.com/report/github.com/benoitkugler/go-weasyprint)
+[![Latest release](https://img.shields.io/github/release/benoitkugler/go-weasyprint.svg)](https://github.com/benoitkugler/go-weasyprint/releases)
 
 Golang port of [Weasyprint](https://github.com/Kozea/WeasyPrint) python Html to Pdf library.