Update Ralph Loop extension to v1.5.0 (#4593)

Update ralph extension submitted by @Rubiss:\n- extensions/catalog.community.json (version, download_url, etc.)\n- docs/community/extensions.md community extensions table\n\nCloses #4548\n\nAssisted-by: GitHub Copilot (model: gpt-5.2-codex, autonomous)\nCo-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: mnriem <15701806+mnriem@users.noreply.github.com>

Author: 3 people

extensions/catalog.community.json

@@ -4244,12 +4244,12 @@
       "id": "ralph",
       "description": "Autonomous implementation loop using AI agent CLI",
       "author": "Rubiss",
-      "version": "1.2.1",
-      "download_url": "https://github.com/Rubiss-Projects/spec-kit-ralph/archive/refs/tags/v1.2.1.zip",
+      "version": "1.5.0",
+      "download_url": "https://github.com/Rubiss-Projects/spec-kit-ralph/archive/refs/tags/v1.5.0.zip",
       "repository": "https://github.com/Rubiss-Projects/spec-kit-ralph",
       "homepage": "https://github.com/Rubiss-Projects/spec-kit-ralph",
-      "documentation": "https://github.com/Rubiss-Projects/spec-kit-ralph/blob/main/README.md",
-      "changelog": "https://github.com/Rubiss-Projects/spec-kit-ralph/blob/main/CHANGELOG.md",
+      "documentation": "https://github.com/Rubiss-Projects/spec-kit-ralph/blob/v1.5.0/README.md",
+      "changelog": "https://github.com/Rubiss-Projects/spec-kit-ralph/blob/v1.5.0/CHANGELOG.md",
       "license": "MIT",
       "category": "code",
       "effect": "read-write",
@@ -4268,6 +4268,10 @@
             "name": "claude",
             "required": false
           },
+          {
+            "name": "opencode",
+            "required": false
+          },
           {
             "name": "git",
             "required": true
@@ -4284,13 +4288,14 @@
         "loop",
         "copilot",
         "codex",
-        "claude"
+        "claude",
+        "opencode"
       ],
       "verified": false,
       "downloads": 0,
       "stars": 0,
       "created_at": "2026-03-09T00:00:00Z",
-      "updated_at": "2026-07-06T00:00:00Z"
+      "updated_at": "2026-09-15T00:00:00Z"
     },
     "reconcile": {
       "name": "Reconcile Extension",