KEP-4427: Updates required for Beta

Addressing these comments:
#4427 (comment)

Author: adrianmoisey

keps/sig-network/4427-relaxed-dns-search-validation/README.md

@@ -15,6 +15,7 @@ tags, and then generate with `hack/update-toc.sh`.
 - [Summary](#summary)
 - [Motivation](#motivation)
   - [Goals](#goals)
+  - [Non-Goals](#non-goals)
 - [Proposal](#proposal)
   - [Risks and Mitigations](#risks-and-mitigations)
 - [Design Details](#design-details)
@@ -171,6 +172,10 @@ The Pod "dns-example" is invalid: spec.dnsConfig.searches[0]: Invalid value: "":
 - Support workloads that need to resolve DNS short names where the full DNS name includes an underscore (`_`).
 - Allow users to use a single dot character `.` as a search string
 
+### Non-Goals
+
+- Allowing support for any characters in the DNS search string
+
 ## Proposal
 
 Introduce a RelaxedDNSSearchValidation feature gate which is disabled by default. When the feature gate is enabled,

keps/sig-network/4427-relaxed-dns-search-validation/kep.yaml

@@ -4,7 +4,7 @@ authors:
   - "@sethev"
   - "@adrianmoisey"
 owning-sig: sig-network
-status: implemented
+status: implementable
 creation-date: 2024-01-22
 reviewers:
   - "@danwinship"