CLP-82 Update notifications Slack channels (#1208)

GitOrigin-RevId: eacff3bf582a8c06bb9fd19f89351a224dc8bdaa

Author: aurelien-coet-sonarsource

.github/workflows/SlackNotify.yml

@@ -19,4 +19,4 @@ jobs:
           GITHUB_TOKEN: ${{ github.token }}
         uses: SonarSource/gh-action_slack-notify@1.0.1
         with:
-          slackChannel: squad-python-notifs
+          slackChannel: squad-corelang-notifs