Test iOS Device SDK against production / final tweaks

[PatrickCroninMM]

This PR:

• Updates the CI github build action to retry builds 3 times. In practice I've found the step pretty flaky, getting stuck when asking Xcode to build the project. A retry has always worked though, so I think it's reasonable to automate that process to minimize manual intervention.
• Updates a platform name in the docs to one that exists in current Xcode versions (so that the example works as written).

[gemini-code-assist]

Code Review

This pull request updates the xcodebuild destination in the README to use 'iPhone 17'. Feedback indicates that the PR description mentions CI workflow updates that are missing from the actual changes. Furthermore, the update introduces an inconsistency with other examples in the README that still reference 'iPhone 16'.

[linear]

SCO-8433 Test iOS Device SDK against production / final tweaks

A/C

• We should make sure it works as expected in production before a client integrates it.
• Since we may be pushing changes to the SDK, this would also be a good time to:
  • Make final repo tweaks
  • Add any release automation needed, but I suspect we're all set with README.dev.md
  • Add in auto-retries for the CI builds that routinely heisenfail