Rename GitHub Actions workflow build to prevent confusion with branch name (#1760)

HyukjinKwon · web-flow · commit f8e746ef9e16 · 2020-09-14T09:19:03.000+09:00
To make it less confused. This is actually matched with Apache Spark side.
diff --git a/.github/workflows/master.yml b/.github/workflows/master.yml
@@ -1,4 +1,4 @@
-name: master
+name: Build and test
 
 on:
   push:
