Update Product Spec Extension to v0.8.3 (#2790)

Update product extension submitted by @d0whc3r:
- extensions/catalog.community.json (version, download_url, metadata)

Closes #2767

extensions/catalog.community.json

@@ -1,6 +1,6 @@
 {
   "schema_version": "1.0",
-  "updated_at": "2026-05-30T00:00:00Z",
+  "updated_at": "2026-06-01T00:00:00Z",
   "catalog_url": "https://raw.githubusercontent.com/github/spec-kit/main/extensions/catalog.community.json",
   "extensions": {
     "aide": {
@@ -1950,12 +1950,12 @@
       "name": "Product Spec Extension",
       "id": "product",
       "description": "Generates PRFAQ, Lean PRD, stakeholder summaries, and technical designs from engineering specs.",
-      "author": "spec-kit-product contributors",
-      "version": "0.1.3",
-      "download_url": "https://github.com/d0whc3r/spec-kit-product/releases/download/v0.1.3/product-0.1.3.zip",
+      "author": "d0whc3r",
+      "version": "0.8.3",
+      "download_url": "https://github.com/d0whc3r/spec-kit-product/releases/download/v0.8.3/product-0.8.3.zip",
       "repository": "https://github.com/d0whc3r/spec-kit-product",
-      "homepage": "https://github.com/d0whc3r/spec-kit-product",
-      "documentation": "https://github.com/d0whc3r/spec-kit-product/blob/main/README.md",
+      "homepage": "https://d0whc3r.github.io/spec-kit-product/",
+      "documentation": "https://github.com/d0whc3r/spec-kit-product/wiki",
       "changelog": "https://github.com/d0whc3r/spec-kit-product/blob/main/CHANGELOG.md",
       "license": "MIT",
       "requires": {
@@ -1963,20 +1963,30 @@
       },
       "provides": {
         "commands": 4,
-        "hooks": 6
+        "hooks": 3
       },
       "tags": [
-        "product",
-        "spec",
-        "prd",
         "design",
-        "documentation"
+        "documentation",
+        "jtbd",
+        "lean-prd",
+        "planning",
+        "prd",
+        "prfaq",
+        "product",
+        "product-management",
+        "requirements",
+        "spec",
+        "spec-kit",
+        "spec-kit-extension",
+        "stakeholder",
+        "technical-design"
       ],
       "verified": false,
       "downloads": 0,
       "stars": 0,
       "created_at": "2026-05-26T00:00:00Z",
-      "updated_at": "2026-05-26T00:00:00Z"
+      "updated_at": "2026-06-01T00:00:00Z"
     },
     "product-forge": {
       "name": "Product Forge",