Update RCTSRWebSocket.m

[bill2004158]

Summary

Only add Sec-WebSocket-Protocol header if has _requestedProtocols.

Changelog

[iOS] [Fixed] - when Sec-WebSocket-Protocol header is empty vaulue, IIS server will return error 502.

Test Plan

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Messages

📖

📋 Verify Changelog Format - A changelog entry has the following format: [CATEGORY] [TYPE] - Message. Details CATEGORY may be: General iOS Android JavaScript Internal (for changes that do not need to be called out in the release notes) TYPE may be: Added, for new features. Changed, for changes in existing functionality. Deprecated, for soon-to-be removed features. Removed, for now removed features. Fixed, for any bug fixes. Security, in case of vulnerabilities. MESSAGE may answer "what and why" on a feature level. Use this to briefly tell React Native users about notable changes.

Generated by 🚫 dangerJS against 2529fa6

[bill2004158]

/cla

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
android	hermes	arm64-v8a	6,764,190	0
android	hermes	armeabi-v7a	6,431,805	0
android	hermes	x86	7,151,881	0
android	hermes	x86_64	7,041,893	0
android	jsc	arm64-v8a	8,935,752	0
android	jsc	armeabi-v7a	8,595,752	0
android	jsc	x86	8,766,573	0
android	jsc	x86_64	9,342,205	0

Base commit: f00795d

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
ios	-	universal	n/a	--

Base commit: f00795d

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

[react-native-bot]

This pull request was successfully merged by @bill2004158 in fd85b84.

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