Update SpecAssay Check extension to v0.5.6 (#4853)

Update specassay-check extension submitted by @rdryfoos:

- extensions/catalog.community.json (version, download_url, digest, tool requirement)

- docs/community/extensions.md community extensions table (unchanged)

Closes #4850

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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": "2026-10-05T00:00:00Z",
+  "updated_at": "2026-10-06T00:00:00Z",
   "catalog_url": "https://raw.githubusercontent.com/github/spec-kit/main/extensions/catalog.community.json",
   "extensions": {
     "adrkit": {
@@ -5226,9 +5226,9 @@
       "id": "specassay-check",
       "description": "Gate 2 refuses silent gaps and emits a trace-manifest (`trace-manifest.json`).",
       "author": "Rik Dryfoos",
-      "version": "0.5.2",
-      "download_url": "https://github.com/rdryfoos/specassay/releases/download/v0.5.2/specassay-check-0.5.2.zip",
-      "sha256": "f481c6794d0cffc6d532721c1acc378287ba291b3e74dbe1e54eef083d1e7a20",
+      "version": "0.5.6",
+      "download_url": "https://github.com/rdryfoos/specassay/releases/download/v0.5.6/specassay-check-0.5.6.zip",
+      "sha256": "1f7112e2e550aacc7dd466cc83b315c0d846f318a611fb93c394bde46cea355b",
       "repository": "https://github.com/rdryfoos/specassay",
       "homepage": "https://www.specassay.com",
       "documentation": "https://github.com/rdryfoos/specassay/blob/main/extensions/specassay-check/README.md",
@@ -5241,6 +5241,7 @@
         "tools": [
           {
             "name": "bash",
+            "version": ">=3.2",
             "required": true
           },
           {
@@ -5265,7 +5266,7 @@
       "downloads": 0,
       "stars": 0,
       "created_at": "2026-08-13T00:00:00Z",
-      "updated_at": "2026-09-24T00:00:00Z"
+      "updated_at": "2026-10-06T00:00:00Z"
     },
     "specjudge": {
       "name": "SpecJudge — right-size the model before you implement",