fix: error "Not authorized" when uploading archives

The `persistentlogin=off` snippet in the request makes the server
to respond the cookie `persistentlogin`, which will then be send in the
POST `teleporter.php` request, which will cause the pihole server to
respond: "Not authorized" when this cookie is sent.

Removing this snippets from the login request removes the
`persistentlogin` from the response. Conesquently, the archive upload
is accepted by the pihole sever.

src/client/v5/index.ts

@@ -39,7 +39,7 @@ export class ClientV5 {
       headers: {
         'content-type': 'application/x-www-form-urlencoded'
       },
-      body: `pw=${encodeURIComponent(host.password)}&persistentlogin=off`,
+      body: `pw=${encodeURIComponent(host.password)}`,
       method: 'POST'
     });
     if (response.status !== 200)