Fix greeting parameters

Author: slimslenderslacks

prompts/examples/hello_world.md

@@ -2,15 +2,15 @@
 name: hello from Docker
 description: send a greeting from Docker
 model: claude-3-5-sonnet-20241022
-parameters:
-  type: object
-  properties:
-    greeting:
-      type: string
-      description: the greeting to send
 tools:
   - name: hello-docker
     description: print a secret message
+    parameters:
+      type: object
+      properties:
+        greeting:
+          type: string
+          description: the greeting to send
     container:
       image: busybox:latest
       command: