internal: fix website build error (#3843)

internal eslint rules are referenced in package json and required to be copied for a proper install.

to ponder: why did this ever work?

resources/build-docusaurus.ts

@@ -14,6 +14,7 @@ fs.writeFileSync(tmpDirPath('package.json'), JSON.stringify(packageJSON));
 
 copyToTmpDir('package-lock.json');
 copyToTmpDir('tsconfig.json');
+copyToTmpDir('resources/eslint-internal-rules');
 copyToTmpDir('src');
 copyToTmpDir('website');