Update ghcr.io/nginx/nginx-gateway-fabric Docker tag to v2.6.2 (#4066)

Co-authored-by: thecluster-bot[bot] <98929874+thecluster-bot[bot]@users.noreply.github.com>

Author: thecluster-bot[bot]

flux/infrastructure/controllers/nginx-gateway/helm-release.yml

@@ -21,7 +21,7 @@ spec:
       replicas: 2
       image:
         repository: ghcr.io/nginx/nginx-gateway-fabric
-        tag: 2.6.0
+        tag: 2.6.2
       gwAPIExperimentalFeatures:
         enable: true
       productTelemetry: