Update .env.sample

Co-authored-by: guillaq <guillaume@workflowai.com>

Author: Pierre

.env.sample

@@ -1,5 +1,5 @@
 # Only change this URL if you are self-hosting WorkflowAI
-WORKFLOWAI_API_URL=https://run.workflowai.com
+# WORKFLOWAI_API_URL=https://run.workflowai.com
 
 # Your WorkflowAI API key
 # [Get your API key here](https://workflowai.com/organization/settings/api-keys)