Fix markdown in requiresMainQueueSetup warning
Fix markdown in requiresMainQueueSetup warning

Summary:
nit-picking

[IOS] [MINOR] [React/Base/RCTModuleData.mm] - Fix markdown in `requiresMainQueueSetup` warning
Closes https://github.com/facebook/react-native/pull/16916

Differential Revision: D6394725

Pulled By: shergin

fbshipit-source-id: 272c5a6ee529af0b162230e8a07275043a888907

javache/react-native,jevakallio/react-native,hoangpham95/react-native,myntra/react-native,hoangpham95/react-native,javache/react-native,hoastoolshop/react-native,janicduplessis/react-native,jevakallio/react-native,exponentjs/react-native,javache/react-native,kesha-antonov/react-native,myntra/react-native,kesha-antonov/react-native,dikaiosune/react-native,jevakallio/react-native,ptmt/react-native-macos,janicduplessis/react-native,pandiaraj44/react-native,jevakallio/react-native,Bhullnatik/react-native,arthuralee/react-native,jevakallio/react-native,exponentjs/react-native,exponent/react-native,facebook/react-native,myntra/react-native,jevakallio/react-native,ptmt/react-native-macos,dikaiosune/react-native,Bhullnatik/react-native,dikaiosune/react-native,rickbeerendonk/react-native,facebook/react-native,dikaiosune/react-native,rickbeerendonk/react-native,facebook/react-native,Bhullnatik/react-native,jevakallio/react-native,ptmt/react-native-macos,pandiaraj44/react-native,myntra/react-native,pandiaraj44/react-native,myntra/react-native,hoastoolshop/react-native,hoangpham95/react-native,facebook/react-native,exponent/react-native,facebook/react-native,javache/react-native,ptmt/react-native-macos,javache/react-native,hoastoolshop/react-native,dikaiosune/react-native,kesha-antonov/react-native,facebook/react-native,rickbeerendonk/react-native,hammerandchisel/react-native,exponent/react-native,kesha-antonov/react-native,Bhullnatik/react-native,exponentjs/react-native,hammerandchisel/react-native,hoastoolshop/react-native,exponent/react-native,hammerandchisel/react-native,rickbeerendonk/react-native,myntra/react-native,rickbeerendonk/react-native,hammerandchisel/react-native,hoangpham95/react-native,hammerandchisel/react-native,dikaiosune/react-native,exponent/react-native,hoangpham95/react-native,janicduplessis/react-native,hoastoolshop/react-native,jevakallio/react-native,ptmt/react-native-macos,Bhullnatik/react-native,exponentjs/react-native,facebook/react-native,myntra/react-native,hammerandchisel/react-native,hammerandchisel/react-native,hoangpham95/react-native,hoangpham95/react-native,rickbeerendonk/react-native,rickbeerendonk/react-native,arthuralee/react-native,janicduplessis/react-native,javache/react-native,exponent/react-native,janicduplessis/react-native,janicduplessis/react-native,pandiaraj44/react-native,rickbeerendonk/react-native,exponentjs/react-native,arthuralee/react-native,Bhullnatik/react-native,pandiaraj44/react-native,facebook/react-native,janicduplessis/react-native,hoangpham95/react-native,hoastoolshop/react-native,myntra/react-native,exponentjs/react-native,hoastoolshop/react-native,ptmt/react-native-macos,exponent/react-native,hammerandchisel/react-native,exponentjs/react-native,janicduplessis/react-native,kesha-antonov/react-native,dikaiosune/react-native,pandiaraj44/react-native,kesha-antonov/react-native,javache/react-native,arthuralee/react-native,facebook/react-native,kesha-antonov/react-native,exponent/react-native,rickbeerendonk/react-native,dikaiosune/react-native,kesha-antonov/react-native,Bhullnatik/react-native,exponentjs/react-native,myntra/react-native,ptmt/react-native-macos,kesha-antonov/react-native,arthuralee/react-native,javache/react-native,Bhullnatik/react-native,pandiaraj44/react-native,jevakallio/react-native,javache/react-native,ptmt/react-native-macos,hoastoolshop/react-native,pandiaraj44/react-native