ci: add test running to speakeasy workflow

Author: mattapperson

.github/workflows/speakeasy_run_on_pr.yaml

@@ -61,6 +61,9 @@ jobs:
         working-directory: examples/nextjs-example
         run: npx tsc --noEmit
 
+      - name: Run tests
+        run: npm test
+
       - name: Commit changes
         run: |
           git config --global user.name 'github-actions[bot]'