docs: update Discord links

docs/contributing.mdx

@@ -87,7 +87,7 @@ Include:
 ## Community
 
 <CardGroup cols={2}>
-  <Card title="Discord" icon="discord" href="https://discord.gg/YjKFvEZSdZ">
+  <Card title="Discord" icon="discord" href="https://discord.gg/strix-ai">
     Join the community for help and discussion.
   </Card>
   <Card title="GitHub Issues" icon="github" href="https://github.com/usestrix/strix/issues">

docs/docs.json

@@ -89,7 +89,7 @@
         },
         {
           "anchor": "Discord",
-          "href": "https://discord.gg/YjKFvEZSdZ",
+          "href": "https://discord.gg/strix-ai",
           "icon": "discord"
         }
       ]
@@ -107,7 +107,7 @@
     "socials": {
       "x": "https://x.com/strix_ai",
       "github": "https://github.com/usestrix",
-      "discord": "https://discord.gg/YjKFvEZSdZ"
+      "discord": "https://discord.gg/strix-ai"
     }
   },
   "fonts": {