fix(apple): Troubleshooting invalid version

[philipphofmann]

DESCRIBE YOUR PR

Update the troubleshooting guide with more information on how to solve the invalid error Xcode compiler error.

IS YOUR CHANGE URGENT?

Help us prioritize incoming PRs by letting us know when the change needs to go live.

• Urgent deadline (GA date, etc.): Multiple users will face a problem with the Cocoa SDK, and we should merged this troubleshooting guide ASAP.
• None: Not urgent, can wait up to 1 week+

SLA

• Teamwork makes the dream work, so please add a reviewer to your PRs.
• Please give the docs team up to 1 week to review your PR unless you've added an urgent due date to it.
  Thanks in advance for your help!

PRE-MERGE CHECKLIST

Make sure you've checked the following before merging your changes:

• Checked Vercel preview for correctness, including links
• PR was reviewed and approved by any necessary SMEs
• PR was reviewed and approved by a member of the Sentry docs team

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Comments	Updated (UTC)
sentry-docs	🛑 Canceled (Inspect)			May 17, 2024 8:54am

[codecov]

Bundle Report

Changes will increase total bundle size by 43 bytes ⬆️

Bundle name	Size	Change
sentry-docs-server	7.38MB	28 bytes ⬆️
sentry-docs-edge-server	458.69kB	27 bytes ⬆️
sentry-docs-client	6.16MB	12 bytes ⬇️

[vivianyentran]

Thanks for adding this info! I added some minor copyedits but LGTM!