Update Quality Gates (Enforcement Layer) extension to v0.5.1 (#5228)

Update gates extension submitted by @schwichtgit:
- extensions/catalog.community.json (version, download_url, sha256, updated_at)

Closes #5227

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: github-actions[bot]

extensions/catalog.community.json

@@ -1,6 +1,6 @@
 {
   "schema_version": "1.0",
-  "updated_at": "2026-11-02T00:00:00Z",
+  "updated_at": "2026-11-03T00:00:00Z",
   "catalog_url": "https://raw.githubusercontent.com/github/spec-kit/main/extensions/catalog.community.json",
   "extensions": {
     "adrkit": {
@@ -2503,9 +2503,9 @@
       "id": "gates",
       "description": "Deterministic quality enforcement for Spec Kit projects at three boundaries: the agent boundary (Claude Code PreToolUse/PostToolUse/Stop hooks), the git boundary (pre-commit / pre-merge-commit / commit-msg), and the CI boundary (projected GitHub Actions / GitLab CI / Jenkins pipelines). One policy file, one verify entrypoint; CI runs the whole policy, and an earlier boundary skips only what the policy declares, by name.",
       "author": "schwichtgit",
-      "version": "0.5.0",
-      "download_url": "https://github.com/schwichtgit/spec-gates/releases/download/v0.5.0/gates-0.5.0.zip",
-      "sha256": "f2d6677bed7e038a95092520a03228dbde0b501b14876a582dc8f8d346787893",
+      "version": "0.5.1",
+      "download_url": "https://github.com/schwichtgit/spec-gates/releases/download/v0.5.1/gates-0.5.1.zip",
+      "sha256": "380a5e403df18bd4e8fb858d7b6bb724688c6ebbd386ddcc3ee9e9eb29c8804b",
       "repository": "https://github.com/schwichtgit/spec-gates",
       "homepage": "https://github.com/schwichtgit/spec-gates",
       "documentation": "https://github.com/schwichtgit/spec-gates/blob/main/docs/how-it-works.md",
@@ -2557,7 +2557,7 @@
       "downloads": 0,
       "stars": 0,
       "created_at": "2026-07-09T00:00:00Z",
-      "updated_at": "2026-10-28T00:00:00Z"
+      "updated_at": "2026-11-03T00:00:00Z"
     },
     "gh-address-cr": {
       "name": "gh-address-cr",