Release note

Signed-off-by: lubronzhan <lubronzhan@gmail.com>

changelogs/unreleased/6188-lubronzhan-minor.md

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+## Gateway API: handle Route conflicts with HTTPRoute.Matches
+
+It's possible that multiple HTTPRoutes will define the same Match conditions. In this case the following logic is applied to resolve the conflict:
+
+- The oldest Route based on creation timestamp. For example, a Route with a creation timestamp of “2020-09-08 01:02:03” is given precedence over a Route with a creation timestamp of “2020-09-08 01:02:04”.
+- The Route appearing first in alphabetical order (namespace/name) for example, foo/bar is given precedence over foo/baz.
+
+With above ordering, any HTTPRoute that ranks lower is marked with Conflict condition.