Fix examples with memory

Signed-off-by: David Gageot <david.gageot@docker.com>

Author: dgageot

docs/USAGE.md

@@ -624,11 +624,12 @@ Implement persistent memory across sessions:
 agents:
   researcher:
     model: claude
-    memory:
-      path: "./research_memory.db"
     instruction: |
       You are a research assistant with persistent memory.
       Remember important findings and reference previous research.
+    toolsets:
+      - type: memory
+        path: ./research_memory.db
 ```
 
 ### Multi-Model Teams

examples/gopher.yaml

@@ -67,11 +67,11 @@ agents:
       - type: filesystem
       - type: shell
       - type: todo
+      - type: memory
+        path: ./gopher.db
       - type: mcp
         ref: docker:context7
       - type: mcp
         ref: docker:ast-grep
         config:
           path: .
-    memory:
-      path: golang_tests_memory.db