Update ngrok to v3

[style95]

Description

Upgrade the version of ngrok to v3. It is required to run the on-demand workflow to debug CI tests.

Related issue and scope

• [ ] I opened an issue to propose and discuss this change (#????)

My changes affect the following components

• [ ] API
• [ ] Controller
• [ ] Message Bus (e.g., Kafka)
• [ ] Loadbalancer
• [ ] Scheduler
• [ ] Invoker
• [ ] Intrinsic actions (e.g., sequences, conductors)
• [ ] Data stores (e.g., CouchDB)
• [ ] Tests
• [ ] Deployment
• [ ] CLI
• [x] General tooling
• [ ] Documentation

Types of changes

• [x] Bug fix (generally a non-breaking change which closes an issue).
• [ ] Enhancement or new feature (adds new functionality).
• [ ] Breaking change (a bug fix or enhancement which changes existing behavior).

Checklist:

• [ ] I signed an Apache CLA.
• [ ] I reviewed the style guides and followed the recommendations (Travis CI will check :).
• [ ] I added tests to cover my changes.
• [ ] My changes require further changes to the documentation.
• [ ] I updated the documentation where necessary.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (aea3a88) 76.60% compared to head (19841b0) 76.50%.

:exclamation: Current head 19841b0 differs from pull request most recent head 09921e2. Consider uploading reports for the commit 09921e2 to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #5465 +/- ## ========================================== - Coverage 76.60% 76.50% -0.11% ========================================== Files 241 241 Lines 14650 14650 Branches 644 644 ========================================== - Hits 11223 11208 -15 - Misses 3427 3442 +15 ```

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