Update frontend strings to Paperless-ngx (#105)

This also includes URLs to ressources.

src-ui/src/index.html

@@ -2,7 +2,7 @@
 <html lang="en">
 <head>
   <meta charset="utf-8">
-  <title>Paperless-ng</title>
+  <title>Paperless-ngx</title>
   <base href="/">
   <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
   <meta name="color-scheme" content="dark light">