[General] [Added] - Add vendor/bundle into .gitignore template

[MoOx]

Ref #32303 (comment)

Summary

Recently, Gemfile & .ruby-version have been introduced but local vendor artifacts have not been correctly added into gitignore, see #32303

Changelog

[General] [Added] - Add vendor/bundle into .gitignore template

Test Plan

N / A

[analysis-bot]

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

Base commit: 4a227ce
Branch: main

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
android	hermes	arm64-v8a	8,291,192	+0
android	hermes	armeabi-v7a	7,628,538	+0
android	hermes	x86	8,764,390	+0
android	hermes	x86_64	8,701,266	+0
android	jsc	arm64-v8a	9,678,350	+0
android	jsc	armeabi-v7a	8,672,393	+0
android	jsc	x86	9,637,053	+0
android	jsc	x86_64	10,231,523	+0

Base commit: 4a227ce
Branch: main

[facebook-github-bot]

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

[react-native-bot]

This pull request was successfully merged by @MoOx in 2f67f5d.

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