Update src/2025h1/open-namespaces.md

Author: nikomatsakis

src/2025h1/open-namespaces.md

@@ -36,7 +36,7 @@ Implement at least Cargo and compiler support for this to be experimented with a
 | Subgoal                                        | Owner(s) or team(s)     | Notes |
 | ---------------------------------------------- | ----------------------- | ----- |
 | Discussion and moral support                   | ![Team][] [cargo], [compiler]       |       |
-| Compiler implementation                               | Goal owner |       |
+| Compiler implementation                               | ![Help wanted][]  |       |
 | Work through lingering cargo issues                             | Goal owner, @epage    |       |
 
 ### Definitions