Update URLs from sin4ch.github.io to sin4.ch for custom domain

Author: sin4ch

index.html

@@ -31,11 +31,11 @@
   <meta property="og:type" content="website">
   <meta property="og:title" content="Osinachi Okpara - AI Developer Advocate and Software Engineer">
   <meta property="og:description" content="Osinachi Okpara is a software engineer, developer advocate and AWS Community Builder, passionate about agentic AI, cloud engineering, and open-source software.">
-  <meta property="og:image" content="https://sin4ch.github.io/social-preview.jpg">
+  <meta property="og:image" content="https://sin4.ch/social-preview.jpg">
   <meta property="og:image:width" content="1200">
   <meta property="og:image:height" content="630">
   <meta property="og:image:alt" content="Osinachi Okpara - AI Developer Advocate and Software Engineer">
-  <meta property="og:url" content="https://sin4ch.github.io">
+  <meta property="og:url" content="https://sin4.ch">
   <meta property="og:site_name" content="Osinachi Okpara">
 
   <!-- Twitter -->
@@ -44,11 +44,11 @@
   <meta name="twitter:creator" content="@sin4ch">
   <meta name="twitter:title" content="Osinachi Okpara - AI Developer Advocate and Software Engineer">
   <meta name="twitter:description" content="Osinachi Okpara is a software engineer, developer advocate and AWS Community Builder, passionate about agentic AI, cloud engineering, and open-source software.">
-  <meta name="twitter:image" content="https://sin4ch.github.io/social-preview.jpg">
+  <meta name="twitter:image" content="https://sin4.ch/social-preview.jpg">
   <meta name="twitter:image:alt" content="Osinachi Okpara - AI Developer Advocate and Software Engineer">
 
   <!-- Canonical URL -->
-  <link rel="canonical" href="https://sin4ch.github.io">
+  <link rel="canonical" href="https://sin4.ch">
 
   <!-- Favicon -->
   <title>Osinachi Okpara - AI Developer Advocate and Software Engineer</title>

robots.txt

@@ -1,4 +1,4 @@
 User-agent: *
 Allow: /
 
-Sitemap: https://sin4ch.github.io/sitemap.xml
+Sitemap: https://sin4.ch/sitemap.xml

sitemap.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
   <url>
-    <loc>https://sin4ch.github.io/</loc>
+    <loc>https://sin4.ch/</loc>
     <lastmod>2026-01-07</lastmod>
     <changefreq>weekly</changefreq>
     <priority>1.0</priority>