Update nightly slack bearer token (#10636)

Co-authored-by: changelog-bot <changelog-bot>

Author: sheidkamp

.github/workflows/nightly-tests.yaml

@@ -604,6 +604,6 @@ jobs:
         env:
           PARENT_JOB_URL: https://github.com/solo-io/gloo/actions/runs/${{github.run_id}} # parent job hyperlink
           PREAMBLE: ${{ steps.compute-preamble.outputs.preamble }}  # text to hyperlink at start of slack message
-          SLACKBOT_BEARER: ${{ secrets.SLACKBOT_BEARER }}
+          SLACKBOT_BEARER: ${{ secrets.SLACK_BOT_TOKEN }}
         run: |
           go run .github/workflows/helpers/notify/slack.go '${{ toJSON(needs) }}'

changelog/v1.19.0-beta11/test-result-slack-notifications.yaml

@@ -0,0 +1,4 @@
+changelog:
+  - type: NON_USER_FACING
+    description: >-
+      Update secret used to send slack notifications of test results