Fix outdated api docs (#2858)

Author: swiatekm

docs/api.md

@@ -40457,7 +40457,8 @@ TargetAllocator indicates a value which determines whether to spawn a target all
         <td>
           AllocationStrategy determines which strategy the target allocator should use for allocation.
 The current options are least-weighted, consistent-hashing and per-node. The default is
-consistent-hashing.<br/>
+consistent-hashing.
+WARNING: The per-node strategy currently ignores targets without a Node, like control plane components.<br/>
           <br/>
             <i>Enum</i>: least-weighted, consistent-hashing<br/>
             <i>Default</i>: consistent-hashing<br/>