Merge pull request #2946 from freifunk-gluon/backport-2945-to-v2023.1.x

[Backport v2023.1.x] docs: avoid DNS request loop

docs/features/dns-cache.rst

@@ -40,7 +40,7 @@ some browsers would open the searchpage instead.
 
   dns = {
     cacheentries = 5000,
-    servers = { '2001:db8::1', },
+    servers = { '2001:4860:4860::8888', '2001:4860:4860::8844' },
   },
 
   next_node = {