Bump rtCamp/action-slack-notify from v2.1.2 to v2.1.3

Bumps [rtCamp/action-slack-notify](https://github.com/rtCamp/action-slack-notify) from v2.1.2 to v2.1.3.
- [Release notes](https://github.com/rtCamp/action-slack-notify/releases)
- [Commits](rtCamp/action-slack-notify@v2.1.2...f565a63)

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/notify-slack.yml

@@ -90,7 +90,7 @@ jobs:
 
       - name: Slack Notification
         if: always()
-        uses: rtCamp/action-slack-notify@v2.1.2
+        uses: rtCamp/action-slack-notify@v2.1.3
         env:
           SLACK_CHANNEL: vtp-autotest-resultat
           SLACK_COLOR: ${{ env.SLACK_COLOR }}