chore: remove Ruby Pinning from 0.70

[cipolleschi]

Summary

Starting from 0.72, we won't be pin any specific ruby version. However, 0.70 and 0.71 are still doing that.
This PR against 0.70, removes the pinning of a specific version of Ruby

Changelog

[iOS][Changed] - Do not pin a specific version of Ruby.

Test Plan

• CircleCI should stay green

[kelset]

headsup, we're "bumping" cocoapods for everyone by doing this - are we sure we want it? is there a way we can be >= 1.11?

[analysis-bot]

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

Base commit: bcec590
Branch: main

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
android	hermes	arm64-v8a	7,596,784	-918,613
android	hermes	armeabi-v7a	7,015,313	-815,972
android	hermes	x86	7,898,004	-1,097,717
android	hermes	x86_64	7,869,808	-981,389
android	jsc	arm64-v8a	9,478,198	+338,169
android	jsc	armeabi-v7a	8,258,794	-72,834
android	jsc	x86	9,417,524	+222,535
android	jsc	x86_64	10,008,773	+555,677

Base commit: bcec590
Branch: main

[cipolleschi]

/rebase