[DOCS][WINDOWS] Difference between pub.dev documentation and project README

[Johan-Carinus]

Issue

When looking at the README file for the 9.2.1 release tag, it is shown that Windows supports both readAll and deleteAll functions.

https://github.com/mogol/flutter_secure_storage/tree/v9.2.1?tab=readme-ov-file#platform-implementation

This is in contrast with the documentation that is listed for the pub.dev release:

https://github.com/mogol/flutter_secure_storage/tree/v9.2.1/flutter_secure_storage#configure-windows-version

I did a quick check in the Windows release notes and it seems like the readAll and writeAll functions were introduced as far back as flutter_secure_storage_windows 1.1.0

Expected behaviour

The changes in regards to the readAll and writeAll functions should have already been documented in the pub.dev documentation.

Suggested fix

I've opened this PR (#796) to fix the issue.

[github-actions]

This issue is stale because it has been open for 60 days with no activity.