Update actions (#743)

Signed-off-by: Knative Automation <automation@knative.team>

.github/workflows/knative-release-notes.yaml

@@ -1,28 +0,0 @@
-# Copyright 2020 The Knative Authors.
-# SPDX-License-Identifier: Apache-2.0
-
-# This file is automagically synced here from github.com/knative-sandbox/knobots
-
-name: 'Release Notes'
-
-on:
-  workflow_dispatch:
-    inputs:
-      branch:
-        description: 'Branch'
-        required: true
-        default: 'main'
-      start-rev:
-        description: 'Start Tag (defaults to merge-base(branch, prev-branch))'
-        required: false
-      end-rev:
-        description: 'End Tag (defaults to HEAD of the target branch)'
-        required: false
-
-jobs:
-  release-notes:
-    uses: knative/actions/.github/workflows/reusable-release-notes.yaml@main
-    with:
-      branch: ${{ github.event.inputs.branch }}
-      start-rev: ${{ github.event.inputs.start-rev }}
-      end-rev: ${{ github.event.inputs.end-rev }}