Add coveralls token to build.yml

Author: mathieujobin

.github/workflows/build.yml

@@ -42,6 +42,7 @@ jobs:
     env:
       BUNDLE_GEMFILE: ${{ github.workspace }}/gemfiles/${{ matrix.gemfile }}.gemfile
       AWS_REGION: us-east1
+      COVERALLS_REPO_TOKEN: 1UIsHrEF5QWZMbgpYeAnMrnqjGkzyQxgn
     steps:
     - uses: actions/checkout@v2
     - uses: ruby/setup-ruby@v1