Merge pull request #259501 from Homebrew/zns-test-fix

zns: test fix

Author: BrewTestBot

Formula/z/zns.rb

@@ -29,6 +29,6 @@ def install
 
   test do
     assert_match version.to_s, shell_output("#{bin}/zns --version")
-    assert_match "a.iana-servers.net.", shell_output("#{bin}/zns example.com -q NS --server 1.1.1.1")
+    assert_match "hera.ns.cloudflare.com.", shell_output("#{bin}/zns example.com -q NS --server 1.1.1.1")
   end
 end