Fix Hugo config and update PaperMod to latest

- Update PaperMod submodule (v8.0+25 -> v8.0+62), which fixes
  the RSS build error from site.Author removal in Hugo 0.159
- Replace deprecated renderhooks.link.enableDefault with
  useEmbedded: "fallback" (deprecated since Hugo 0.148)
- Add params.author (name, email) for RSS feed metadata

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

hugo.yaml

@@ -8,6 +8,10 @@ enableRobotsTXT: true
 params:
   description: Just a great personal website
 
+  author:
+    name: Andrew Stryker
+    email: andrewjstryker@proton.me
+
   # PaperMod settings
   ShowReadingTime: true
   ShowCodeCopyButtons: true
@@ -114,7 +118,7 @@ markup:
       unsafe: true
     renderhooks:
       link:
-        enableDefault: true
+        useEmbedded: "fallback"
     extensions:
       passthrough:
         enable: true