docs: Make get-message-history use curl example system.

templates/zerver/api/get-message-history.md

@@ -18,10 +18,7 @@ Note that edit history may be disabled in some organizations; see the
 
 {tab|curl}
 
-``` curl
-curl -X GET {{ api_url }}/v1/messages/{message_id}/history \
-    -u BOT_EMAIL_ADDRESS:BOT_API_KEY
-```
+{generate_code_example(curl)|/messages/{message_id}/history:get|example}
 
 {end_tabs}
 

zerver/openapi/test_curl_examples.py

@@ -23,6 +23,7 @@ exclude_list = [
     'get-raw-message.md',
     'update-message.md',
     'delete-message.md',
+    'get-message-history.md',
 ]
 
 def test_generated_curl_examples_for_success(client: Client) -> None: