chore: Temporary using xcodeproj's commit that bumps rexml #275

Job	Run time
Build Amplify Swift for iOS / Build Amplify-Build \| iOS	10m 39s
Build Amplify Swift for macOS / Build Amplify-Build \| macOS	9m 49s
Build Amplify Swift for tvOS / Build Amplify-Build \| tvOS	7m 52s
Build Amplify Swift for watchOS / Build Amplify-Build \| watchOS	11m 6s
Confirm Passing Build Steps	1s
	39m 27s

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