chore: bump @testing-library/react from 13.3.0 to 13.4.0 in /site (#3905)

Bumps [@testing-library/react](https://github.com/testing-library/react-testing-library) from 13.3.0 to 13.4.0.
- [Release notes](https://github.com/testing-library/react-testing-library/releases)
- [Changelog](https://github.com/testing-library/react-testing-library/blob/main/CHANGELOG.md)
- [Commits](https://github.com/testing-library/react-testing-library/compare/v13.3.0...v13.4.0)

---
updated-dependencies:
- dependency-name: "@testing-library/react"
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

site/package.json

@@ -77,7 +77,7 @@
     "@storybook/addon-links": "6.5.9",
     "@storybook/react": "6.4.22",
     "@testing-library/jest-dom": "5.16.4",
-    "@testing-library/react": "^13.3.0",
+    "@testing-library/react": "^13.4.0",
     "@testing-library/user-event": "^14.4.3",
     "@types/express": "4.17.13",
     "@types/jest": "27.4.1",

site/yarn.lock

@@ -3153,10 +3153,10 @@
     "@babel/runtime" "^7.12.5"
     react-error-boundary "^3.1.0"
 
-"@testing-library/react@^13.3.0":
-  version "13.3.0"
-  resolved "https://registry.yarnpkg.com/@testing-library/react/-/react-13.3.0.tgz#bf298bfbc5589326bbcc8052b211f3bb097a97c5"
-  integrity sha512-DB79aA426+deFgGSjnf5grczDPiL4taK3hFaa+M5q7q20Kcve9eQottOG5kZ74KEr55v0tU2CQormSSDK87zYQ==
+"@testing-library/react@^13.4.0":
+  version "13.4.0"
+  resolved "https://registry.yarnpkg.com/@testing-library/react/-/react-13.4.0.tgz#6a31e3bf5951615593ad984e96b9e5e2d9380966"
+  integrity sha512-sXOGON+WNTh3MLE9rve97ftaZukN3oNf2KjDy7YTx6hcTO2uuLHuCGynMDhFwGw/jYf4OJ2Qk0i4i79qMNNkyw==
   dependencies:
     "@babel/runtime" "^7.12.5"
     "@testing-library/dom" "^8.5.0"