Bump intersection-observer from 0.12.0 to 0.12.2 (#18682)

Bumps [intersection-observer](https://github.com/GoogleChromeLabs/intersection-observer) from 0.12.0 to 0.12.2.
- [Release notes](https://github.com/GoogleChromeLabs/intersection-observer/releases)
- [Commits](https://github.com/GoogleChromeLabs/intersection-observer/commits

)

---
updated-dependencies:
- dependency-name: intersection-observer
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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