Bump intl-relativeformat from 6.4.2 to 6.4.3 (#11380)

Bumps [intl-relativeformat](https://github.com/formatjs/formatjs) from 6.4.2 to 6.4.3.
- [Release notes](https://github.com/formatjs/formatjs/releases)
- [Commits](https://github.com/formatjs/formatjs/compare/intl-relativeformat@6.4.2...intl-relativeformat@6.4.3)

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

package.json

@@ -103,7 +103,7 @@
     "intersection-observer": "^0.7.0",
     "intl": "^1.2.5",
     "intl-messageformat": "^2.2.0",
-    "intl-relativeformat": "^6.4.2",
+    "intl-relativeformat": "^6.4.3",
     "is-nan": "^1.2.1",
     "js-yaml": "^3.13.1",
     "lodash": "^4.17.14",