[RN][Changelog] Create Changelog for 0.75.0-RC.2

[cipolleschi]

Summary:

Adds the Changelog for RC.2

Changelog:

[General][Added] - Add changelog lines for RC2

Test Plan:

N/A

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

[facebook-github-bot]

@cortinico merged this pull request in e6dd44d.

[github-actions]

This pull request was successfully merged by @cipolleschi in e6dd44d.

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

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
android	hermes	arm64-v8a	20,316,119	+4
android	hermes	armeabi-v7a	n/a	--
android	hermes	x86	n/a	--
android	hermes	x86_64	n/a	--
android	jsc	arm64-v8a	23,513,309	+8
android	jsc	armeabi-v7a	n/a	--
android	jsc	x86	n/a	--
android	jsc	x86_64	n/a	--

Base commit: c6cbaf2
Branch: main