fix copy/paste error

.github/workflows/deletedroplets.yml

@@ -26,7 +26,7 @@ jobs:
           webhook_token: ${{ secrets.DISCORD_WEBHOOK_TOKEN }}
           color: "#42f545"
           username: "GitHub Bot"
-          message: " ${{ github.repository}}:${{ github.event.workflow_run.name }}:PR ${{ env.pull_request}} failed: droplets from this workflow (tag ${{ github.event.workflow_run.id }}-${{ github.event.workflow_run.run_attempt }}) will be deleted in 3 hours"
+          message: " ${{ github.repository }}:${{ github.event.workflow_run.name }}:PR ${{ env.pull_request }} was successful: droplets from this workflow (tag ${{ github.event.workflow_run.id }}-${{ github.event.workflow_run.run_attempt}}) will be deleted in 15 min"
           file: ./results/results.log
       - name: delete droplets
         if: success() || failure()