Update stacklok/toolhive-studio to v0.31.0

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/upstream-projects.yaml

@@ -71,7 +71,7 @@ projects:
 
   - id: toolhive-studio
     repo: stacklok/toolhive-studio
-    version: v0.30.0
+    version: v0.31.0
     docs_paths:
       - docs/toolhive/guides-ui