[manual] Use api.zulip.com to access the Humbug API.

This needs to be deployed after the nginx configuration is deployed.

(imported from commit 167a3d9d27595d40883bb400ebcc44c4ad9b6a2f)

examples/curl-examples

@@ -1,13 +1,13 @@
 #!/bin/sh
 # Two quick API tests using curl
 
-curl https://api.humbughq.com/v1/send_message \
+curl https://api.zulip.com/v1/send_message \
     -d "api-key=BOT_API_KEY" \
     -d "email=BOT_EMAIL" \
     -d "type=private" -d "content=test" \
     -d "to=RECIPIENT_EMAIL"
 
-curl https://api.humbughq.com/v1/get_messages \
+curl https://api.zulip.com/v1/get_messages \
     -d "api-key=BOT_API_KEY" \
     -d "email=BOT_EMAIL"