chore(deps): bump applicationinsights in /services/121-service

Bumps [applicationinsights](/~https://github.com/microsoft/ApplicationInsights-node.js) from 2.9.6 to 3.4.0.
- [Release notes](/~https://github.com/microsoft/ApplicationInsights-node.js/releases)
- [Commits](microsoft/ApplicationInsights-node.js@2.9.6...3.4.0)

---
updated-dependencies:
- dependency-name: applicationinsights
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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