Add a GitHub action to run all tests on push - should fail

Author: CarlosCD

.github/workflows/run_tests.yml

@@ -0,0 +1,15 @@
+name: Run Tests
+on: [ push ]
+jobs:
+  run_tests:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+      - name: Set up Ruby
+        uses: ruby/setu-rubyp@v1
+        with:
+          ruby-version: .ruby-version
+          bundler-cache: true
+      - name: Run specs
+        run: rake

spec/1_number_format_spec.rb

@@ -18,7 +18,7 @@
         1000 => '1,000',
         10000 => '10,000',
         100000 => '100,000',
-        1000000 => '1,000,000',
+        1000000 => '1000,000',
         35235235 => '35,235,235',
         1_000_000_000 => '1,000,000,000'
       }