Change key identifier from "Esc" -> "Escape"

[appden]

Please select one of the following

• I am removing an existing difference between facebook/react-native and microsoft/react-native-macos 👍
• I am cherry-picking a change from Facebook's react-native into microsoft/react-native-macos 👍
• I am making a fix / change for the macOS implementation of react-native
• I am making a change required for Microsoft usage of react-native

Summary

This aligns the name to be same as in react-native-windows and the standard.

Changelog

[macOS] [Fixed] - Change key identifier from "Esc" -> "Escape"

Test Plan

Confirmed correct key identifier is logged in the Key Event example in RNTester.

Microsoft Reviewers: Open in CodeFlow

[harrieshin]

lets make sure we cherry pick to .63 stable as well!

[HeyImChris]

lets make sure we cherry pick to .63 stable as well!

@appden are you able to make this change in the 0.63-stable branch as well? If not I can, just let me know

[appden]

@appden are you able to make this change in the 0.63-stable branch as well? If not I can, just let me know

Just clarifying: are you asking that I open another PR targeting that branch?

[HeyImChris]

@appden are you able to make this change in the 0.63-stable branch as well? If not I can, just let me know

Just clarifying: are you asking that I open another PR targeting that branch?

Hey not a problem, here's what I meant 0.63-stable PR