feat(self-entry): point graph_url at GitHub Pages while repo is private

Author: amacsmith

registry.json

@@ -8,7 +8,7 @@
       "repo": "registry",
       "default_branch": "main",
       "format": "generic@1",
-      "graph_url": "https://raw.githubusercontent.com/understand-quickly/registry/main/registry.json",
+      "graph_url": "https://amacsmith.github.io/understand-quickly/registry.json",
       "description": "The registry indexes itself; useful as a meta entry.",
       "miss_count": 1,
       "status": "missing",