Update ref docs and change log for iOS 4.15.2

[ChristianWolf-mapspeople]

No description provided.

[Copilot]

Pull Request Overview

Updates references and changelog for iOS SDK v4.15.2.

• Set 4.15.2 as the Latest iOS SDK reference and moved 4.15.1 to Previous versions.
• Added a v4.15.2 changelog entry under Fixed.

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
reference-docs/ios-sdk.md	Points Latest to 4.15.2 docs and adds 4.15.1 to Previous versions.
other/changelog/ios-sdk/v4.md	Adds 4.15.2 changelog section with a Fixed note.

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}