Replace crawling.us with clicks.domains

We bought clicks.domains (thanks @PineaFan!). It's nicer. We should be
using it for our internal domains references rather than crawling.us

Change-Id: If568489f34dc8ff4bf3b7a5ecfc35fee3d9c55a6
Reviewed-on: https://git.clicks.codes/c/Clicks/NixFiles/+/281
Reviewed-by: Samuel Shuert <coded@clicks.codes>
Tested-by: Skyler Grey <minion@clicks.codes>
diff --git a/modules/common/cloudflare-ddns.nix b/modules/common/cloudflare-ddns.nix
index e199f16..4608d09 100644
--- a/modules/common/cloudflare-ddns.nix
+++ b/modules/common/cloudflare-ddns.nix
@@ -4,7 +4,7 @@
     proxied = false;
     ipv4 = true;
     ipv6 = false;
-    domains = [ "a1.crawling.us" ];
+    domains = [ "a1.clicks.domains" ];
     apiTokenFile = config.sops.secrets.cloudflare_ddns__api_token.path;
   };