fixes validatino error

Author: pcrespov

packages/models-library/src/models_library/api_schemas_webserver/wallets.py

@@ -80,10 +80,10 @@ class CreateWalletBodyParams(OutputSchema):
     thumbnail: str | None = None
 
 
-class PutWalletBodyParams(OutputSchema):
+class PutWalletBodyParams(InputSchema):
     name: str
     description: str | None
-    thumbnail: str | None
+    thumbnail: str | None = None
     status: WalletStatus