Bump bats-core/bats-action from 3.0.1 to 4.0.0 (UniversalRobots#431)

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -116,7 +116,7 @@ jobs:
           bundler-cache: true  # runs 'bundle install' and caches installed gems automatically
       - name: Setup Bats and bats libs
         id: setup-bats
-        uses: bats-core/bats-action@3.0.1
+        uses: bats-core/bats-action@4.0.0
       - name: Install Ruby dependencies
         run: bundle update --bundler && bundle install
       - name: Run unittests