Merge pull request #58050 from jldohmann/OSDOCS-5400

OSDOCS-5400: fix code example

Author: jldohmann

modules/nw-dns-cache-tuning.adoc

@@ -27,8 +27,8 @@ metadata:
   name: default
 spec:
   cache:
-    successTTL: 1h <1>
-    denialTTL: 0.5h10m <2>
+    positiveTTL: 1h <1>
+    negativeTTL: 0.5h10m <2>
 ----
 +
 <1> The string value `1h` is converted to its respective number of seconds by CoreDNS. If this field is omitted, the value is assumed to be `0s` and the cluster uses the internal default value of `900s` as a fallback.