chore(catalog): bump v-model extension to v0.6.0 (#2399)

Update v-model extension entry in community catalog to reflect the v0.6.0
release: https://github.com/leocamello/spec-kit-v-model/releases/tag/v0.6.0

Highlights of v0.6.0:
- Domain Overlay Architecture (9 overlay manifests; automotive, medical,
  aerospace, general)
- ID Lifecycle Model (Proposed -> Active -> Deprecated -> Removed)
- Standards enrichment across all 11 commands (IEEE 1012:2016, ISO
  25010:2023, ISO 42030:2019, ISO 12207:2017, IEEE 1016, IEEE 29148,
  ISO 29119-4, ISO 14971, DO-178C, ARP4761A, INCOSE SE Handbook)
- Aerospace DO-178C support: Flight Warning Computer DAL-A golden fixture
- Test infrastructure: fixtures reorganized; +11 LLM-as-judge evals (42 -> 53)

Command count remains 14 (no new commands added in this release).
Stars updated to live count (21) from GitHub API.

extensions/catalog.community.json

@@ -2429,8 +2429,8 @@
       "id": "v-model",
       "description": "Enforces V-Model paired generation of development specs and test specs with full traceability.",
       "author": "leocamello",
-      "version": "0.5.0",
-      "download_url": "https://github.com/leocamello/spec-kit-v-model/archive/refs/tags/v0.5.0.zip",
+      "version": "0.6.0",
+      "download_url": "https://github.com/leocamello/spec-kit-v-model/archive/refs/tags/v0.6.0.zip",
       "repository": "https://github.com/leocamello/spec-kit-v-model",
       "homepage": "https://github.com/leocamello/spec-kit-v-model",
       "documentation": "https://github.com/leocamello/spec-kit-v-model/blob/main/README.md",
@@ -2452,9 +2452,9 @@
       ],
       "verified": false,
       "downloads": 0,
-      "stars": 0,
+      "stars": 21,
       "created_at": "2026-02-20T00:00:00Z",
-      "updated_at": "2026-04-06T00:00:00Z"
+      "updated_at": "2026-04-25T00:00:00Z"
     },
     "verify": {
       "name": "Verify Extension",