fix(machine-readable): replace rsr-template-repo identity in root CLADE.a2ml

The root-level .machine_readable/CLADE.a2ml still carried leftover
rsr-template-repo template identity. Correct the wrong identity
strings to reflect that this repo IS nextgen-typing (confirmed
against the authoritative 6a2/anchor/ANCHOR.a2ml and README):

  - canonical-name: rsr-template-repo    -> nextgen-typing
  - prefixed-name:  rm-rsr-template-repo -> rm-nextgen-typing
    (clade prefix "rm" read from [clade] primary)
  - forges github/gitlab/bitbucket: hyperpolymath/rsr-template-repo
    -> hyperpolymath/nextgen-typing

Registry uuid is assigned data and is left untouched. The
[lineage] parent ("RSR template — scaffold for new repos") is
accurate provenance (type = standalone) and is left as-is.

https://claude.ai/code/session_013wg3Mtq2QFhYi4XVw1Z6z7

Author: claude

.machine_readable/CLADE.a2ml

@@ -6,8 +6,8 @@
 uuid = "a5ea1382-a34c-5334-8a46-a2ebe904c810"
 primary-forge = "github"
 primary-owner = "hyperpolymath"
-canonical-name = "rsr-template-repo"
-prefixed-name = "rm-rsr-template-repo"
+canonical-name = "nextgen-typing"
+prefixed-name = "rm-nextgen-typing"
 
 [clade]
 primary = "rm"
@@ -16,9 +16,9 @@ assigned = "2026-03-16"
 rationale = ""
 
 [forges]
-github = "hyperpolymath/rsr-template-repo"
-gitlab = "hyperpolymath/rsr-template-repo"
-bitbucket = "hyperpolymath/rsr-template-repo"
+github = "hyperpolymath/nextgen-typing"
+gitlab = "hyperpolymath/nextgen-typing"
+bitbucket = "hyperpolymath/nextgen-typing"
 
 [lineage]
 type = "standalone"