ci: load environment variables in checkly deployment

Author: ixartz

.github/workflows/checkly.yml

@@ -49,4 +49,4 @@ jobs:
       - name: Deploy checks # if the test run was successful and we are on Production, deploy the checks
         id: deploy-checks
         if: steps.run-checks.outcome == 'success' && github.event.deployment_status.environment == 'Production'
-        run: npx checkly deploy --force
+        run: npx dotenv -c production -- npx checkly deploy --force