Remove blog links from contact and navigation sections

Remove references to "Tech-Blog" and "KI-Blog" from the contact and navbar components, consolidating external links.

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artifacts/joachim-portfolio/src/components/contact.tsx

@@ -7,16 +7,6 @@ const emailAddresses = [
 ];
 
 const links = [
-  {
-    label: "Tech-Blog",
-    url: "https://blog.unixweb.de",
-    desc: "300+ Fachartikel rund um Linux, Server & IT",
-  },
-  {
-    label: "KI-Blog",
-    url: "https://ki-blog.unixweb.de",
-    desc: "KI, Automation, n8n & KI-gestützte Entwicklung",
-  },
   {
     label: "n8n Automation",
     url: "https://n8n.io/creators/jhummel/",