Use make test in GitHub Actions workflow (#109)

* Initial plan

* Update GitHub Actions workflow to use make test

Co-authored-by: kwerle <23320+kwerle@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: kwerle <23320+kwerle@users.noreply.github.com>

Author: Copilot

.github/workflows/test.yml

@@ -18,9 +18,5 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
-    - name: build
-      run: make image
-    - name: test
-      run: docker run --rm ruby_language_server rake | tee test.log
-    - name: rubocop
-      run: docker run --rm ruby_language_server rubocop | tee rubocop.log
+    - name: Run tests
+      run: make test