Fix manifest references in release README

README.md

@@ -17,8 +17,8 @@ all entries are wired into PyC runtime dispatch.
 ## Contents
 
 - `kernels/prototypes/`: standalone CUDA prototype sources.
-- `manifests/kernels.json`: the 19-entry lab catalog, including build/run commands.
-- `manifests/kernels.json`: the catalog mirrored into the registry release.
+- `manifests/lab_kernels.json`: the 19-entry lab catalog, including build/run commands.
+- `manifests/registry_kernels.json`: the catalog mirrored into the registry release.
 - `PERFORMANCE_SUMMARY.md`: selected H100 campaign measurements and the optimization progression.
 
 ## Optimization themes