Add link to the dynamic-config-manager EP PR

* features/features.go
(FeatureGateIngressControllerDynamicConfigurationManager): Add a link
to the dynamic-config-manager enhancement proposal PR.

Author: Miciah

features/features.go

@@ -630,7 +630,7 @@ var (
 								reportProblemsToJiraComponent("Networking/router").
 								contactPerson("miciah").
 								productScope(ocpSpecific).
-								enhancementPR(legacyFeatureGateWithoutEnhancement).
+								enhancementPR("https://github.com/openshift/enhancements/pull/1687").
 								enableIn(configv1.DevPreviewNoUpgrade, configv1.TechPreviewNoUpgrade).
 								mustRegister()