docs: Improve Bedrock suggested IAM policy (#37278)

Closes https://github.com/zed-industries/zed/issues/37251

H/T: @brandon-fryslie

Release Notes:

- N/A
f290daf7eaPeter Tripp committed on 9/1/2025, 12:08:17 AM· committed by GitHubparent129bff8
1 file changedLine totals unavailable