Use RelPermalink for author profile links to fix deploy preview URLs

Absolute Permalink bakes in the baseURL (https://powershell.org), which
breaks links on Netlify deploy previews. RelPermalink gives a root-relative
path that works on any deployment domain.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017vQdwS6gqbFhxk55vCFPcD

Author: claude

themes/powershell-community/layouts/_default/authors.html

@@ -46,7 +46,7 @@ <h1 class="text-4xl lg:text-5xl font-bold mb-2">{{ .Title }}</h1>
 
                     <!-- Author Info -->
                     <h2 class="text-2xl font-bold text-center text-gray-900 mb-2">
-                        <a href="{{ .Page.Permalink }}" class="hover:text-blue-600 transition-colors duration-200">
+                        <a href="{{ .Page.RelPermalink }}" class="hover:text-blue-600 transition-colors duration-200">
                             {{ .Page.Title }}
                         </a>
                     </h2>
@@ -58,7 +58,7 @@ <h2 class="text-2xl font-bold text-center text-gray-900 mb-2">
                     </p>
 
                     <!-- View Profile Button -->
-                    <a href="{{ .Page.Permalink }}"
+                    <a href="{{ .Page.RelPermalink }}"
                        class="block w-full bg-blue-600 text-white text-center px-4 py-2 rounded-lg font-medium hover:bg-blue-700 transition-colors duration-200">
                         <i class="fas fa-arrow-right mr-2"></i>View Profile
                     </a>