docs: fixup callouts

Author: dshafik

docs/optionals.md

@@ -4,11 +4,11 @@ Bag supports optional parameters using the `Optional` class. `Optional` paramete
 that can be omitted when creating a Bag object, and will automatically be excluded from array and JSON 
 representations.
 
-[!NOTE]
+> [!NOTE]
 > Optional parameters are _different_ from nullable parameters, nulls are still included in the output, 
 > and can be combined with `Optional`. Optional parameters **will not** be filled with nulls when omitted. 
 
-[!WARN]
+> [!WARN]
 > You _must_ specify at least one other type. Optionals cannot be combined with `mixed`.
 
 To make a property optional, use a union type that includes `Optional`: