Refer the triggered tag name

.github/workflows/build.yml

@@ -14,7 +14,8 @@ jobs:
     steps:
       - name: Generate release name
         id: release_name
-        run: echo "::set-output name=name::`date "+%Y-%m-%d-%H%M%S"`"
+        # https://github.community/t/how-to-get-just-the-tag-name/16241/4
+        run: echo ::set-output name=name::${GITHUB_REF/refs\/*s\//}
       - name: Create release
         id: create_release
         uses: actions/create-release@v1