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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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -65,7 +65,7 @@
     "http-link-header": "^1.0.4",
     "immutable": "^4.1.0",
     "imports-loader": "^1.2.0",
-    "intersection-observer": "^0.12.0",
+    "intersection-observer": "^0.12.2",
     "intl": "^1.2.5",
     "intl-messageformat": "^2.2.0",
     "intl-relativeformat": "^6.4.3",