fix: mitigate DangerJS transpilation bug

[blakef]

Danger seems to have a bug where it's not transpiling the import of
@rnx-kit/rn-changelog-generator. This mitigates the issue to get our
project back on track.

This can be replicated locally by:

DEBUG="*" DANGER_GITHUB_API_TOKEN=$GITHUB_TOKEN yarn danger pr https://github.com/facebook/react-native/pull/47182

Changelog: [internal]

[react-native-bot]

	Fails
🚫	Danger failed to run dangerfile.js.

	Warnings
⚠️	📋 Missing Summary - Can you add a Summary? To do so, add a "## Summary" section to your PR description. This is a good place to explain the motivation for making this change.
⚠️	📋 Missing Test Plan - Can you add a Test Plan? To do so, add a "## Test Plan" section to your PR description. A Test Plan lets us know how these changes were tested.

Error ReferenceError

validateChangelog is not defined
ReferenceError: validateChangelog is not defined
    at Object.<anonymous> (dangerfile.js:48:18)
    at Module._compile (node:internal/modules/cjs/loader:1364:14)
    at requireFromString (/home/runner/work/react-native/react-native/node_modules/require-from-string/index.js:28:4)
    at /home/runner/work/react-native/react-native/node_modules/danger/distribution/runner/runners/inline.js:161:68
    at step (/home/runner/work/react-native/react-native/node_modules/danger/distribution/runner/runners/inline.js:52:23)
    at Object.next (/home/runner/work/react-native/react-native/node_modules/danger/distribution/runner/runners/inline.js:33:53)
    at /home/runner/work/react-native/react-native/node_modules/danger/distribution/runner/runners/inline.js:27:71
    at new Promise (<anonymous>)
    at __awaiter (/home/runner/work/react-native/react-native/node_modules/danger/distribution/runner/runners/inline.js:23:12)
    at runDangerfileEnvironment (/home/runner/work/react-native/react-native/node_modules/danger/distribution/runner/runners/inline.js:118:132)
    at /home/runner/work/react-native/react-native/node_modules/danger/distribution/platforms/GitHub.js:181:38
    at step (/home/runner/work/react-native/react-native/node_modules/danger/distribution/platforms/GitHub.js:44:23)
    at Object.next (/home/runner/work/react-native/react-native/node_modules/danger/distribution/platforms/GitHub.js:25:53)
    at /home/runner/work/react-native/react-native/node_modules/danger/distribution/platforms/GitHub.js:19:71
    at new Promise (<anonymous>)
    at __awaiter (/home/runner/work/react-native/react-native/node_modules/danger/distribution/platforms/GitHub.js:15:12)
    at Object.executeRuntimeEnvironment (/home/runner/work/react-native/react-native/node_modules/danger/distribution/platforms/GitHub.js:144:88)
    at /home/runner/work/react-native/react-native/node_modules/danger/distribution/commands/danger-runner.js:101:47
    at step (/home/runner/work/react-native/react-native/node_modules/danger/distribution/commands/danger-runner.js:34:23)
    at Object.next (/home/runner/work/react-native/react-native/node_modules/danger/distribution/commands/danger-runner.js:15:53)
    at fulfilled (/home/runner/work/react-native/react-native/node_modules/danger/distribution/commands/danger-runner.js:6:58)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)

Dangerfile

43|     'This will require a manual import by a Facebook employee.';
44|   warn(`${title} - <i>${idea}</i>`);
45| }
46| 
47| // Provides advice if a test plan is missing.
--------------------^
48| const includesTestPlan =
49|   danger.github.pr.body &&
50|   danger.github.pr.body.toLowerCase().includes('## test plan');
51| if (!includesTestPlan && !isFromPhabricator) {

Generated by 🚫 dangerJS against 6291332

[facebook-github-bot]

@blakef has imported this pull request. If you are a Meta employee, you can view this diff on Phabricator.

[facebook-github-bot]

@blakef merged this pull request in 94fdc38.

[react-native-bot]

This pull request was successfully merged by @blakef in 94fdc38

^{When will my fix make it into a release? | How to file a pick request?}