doc README: Update build status badge

The badge provided by travis-ci is no longer used.
Use the badge provided by github action.

diff --git a/README.md b/README.md
index 4e23a37..3b8f787 100644 (file)
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-[![Build Status](https://travis-ci.org/Samsung/thorvg.svg?branch=master)](https://travis-ci.org/Samsung/thorvg)
+[![Continuous-integration](https://github.com/Samsung/thorvg/actions/workflows/actions.yml/badge.svg)](https://github.com/Samsung/thorvg/actions/workflows/actions.yml)
 [![Gitter](https://badges.gitter.im/thorvg/community.svg)](https://gitter.im/thorvg/community?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
 
 # ThorVG