Update README lockfile example to match BTreeMap format
Assisted-by: Claude Opus 4.6 via pi
change lwusvywkrxyvklwolovlrylsqkkmpopw
commit 6658e3f4e241fa3d7855e44240015d57f8ad854b
author Alpha Chen <alpha@kejadlen.dev>
date
parent vxqmstvv 
diff --git a/README.md b/README.md
index 7bbd8ee..b63c181 100644
--- a/README.md
+++ b/README.md
@@ -84,12 +84,12 @@ SHA for each skill. `install` reads from the lockfile; `update` writes to it.
 
 ```yml
 plugins:
-  - name: jj
+  jj:
     src: https://github.com/user/skills-repo
     path: skills/jj
     rev: abc123def456...     # resolved commit SHA
 
-  - name: gh-pr
+  gh-pr:
     src: https://github.com/user/skills-repo
     path: skills/gh-pr
     rev: abc123def456...