Progress notifications should not be a loop (modelcontextprotocol#953)

* Progress notifications should not be a loop

* Address PR review comments

Author: mikekistler

docs/specification/2025-06-18/basic/utilities/progress.mdx

@@ -78,11 +78,9 @@ sequenceDiagram
     Sender->>Receiver: Method request with progressToken
 
     Note over Sender,Receiver: Progress updates
-    loop Progress Updates
-        Receiver-->>Sender: Progress notification (0.2/1.0)
-        Receiver-->>Sender: Progress notification (0.6/1.0)
-        Receiver-->>Sender: Progress notification (1.0/1.0)
-    end
+    Receiver-->>Sender: Progress notification (0.2/1.0)
+    Receiver-->>Sender: Progress notification (0.6/1.0)
+    Receiver-->>Sender: Progress notification (1.0/1.0)
 
     Note over Sender,Receiver: Operation complete
     Receiver->>Sender: Method response

docs/specification/draft/basic/utilities/progress.mdx

@@ -78,11 +78,9 @@ sequenceDiagram
     Sender->>Receiver: Method request with progressToken
 
     Note over Sender,Receiver: Progress updates
-    loop Progress Updates
-        Receiver-->>Sender: Progress notification (0.2/1.0)
-        Receiver-->>Sender: Progress notification (0.6/1.0)
-        Receiver-->>Sender: Progress notification (1.0/1.0)
-    end
+    Receiver-->>Sender: Progress notification (0.2/1.0)
+    Receiver-->>Sender: Progress notification (0.6/1.0)
+    Receiver-->>Sender: Progress notification (1.0/1.0)
 
     Note over Sender,Receiver: Operation complete
     Receiver->>Sender: Method response