chore(ci): change condition for success messages (#30796)

For Stencil Nightly alert messages, instead of checking if anything
succeeded, check if nothing failed.

---------

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## What is the current behavior?
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Both a success and failure message was sent when some jobs passed and
some failed.
## What is the new behavior?
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this PR. -->

- Success message should only be sent if nothing failed.

## Does this introduce a breaking change?

- [ ] Yes
- [X] No

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## Other information

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screenshots of how the component looks before and after the change. -->

.github/workflows/stencil-nightly.yml

@@ -229,7 +229,7 @@ jobs:
   send-success-messages:
     needs: [test-core-clean-build, test-core-lint, test-core-spec, verify-screenshots, verify-test-vue-e2e, verify-test-angular-e2e, verify-test-react-router-e2e, verify-test-react-e2e]
     runs-on: ubuntu-latest
-    if: ${{ !cancelled() && contains(needs.*.result, 'success') }}
+    if: ${{ !cancelled() && !contains(needs.*.result, 'failure') }}
     steps:
       - name: Notify success on Discord
         run: |