fix(example): Incorrect minimum version configuration.

[StanleyCocos]

Description

Due to the dependency on flutter_lints: ^5.0.0, version 5.0.0 requires at least Dart SDK 3.5.

• fix: [Request]: Update the minimum version configuration. #3366

Checklist

• I read the Contributor Guide and followed the process outlined there for submitting PRs.
• I titled the PR using Conventional Commits.
• I did not modify the CHANGELOG.md nor the plugin version in pubspec.yaml files.
• All existing and new tests are passing.
• The analyzer (flutter analyze) does not report any problems on my PR.

Breaking Change

Does your PR require plugin users to manually update their apps to accommodate your change?

• Yes, this is a breaking change (please indicate that with a ! in the title as explained in Conventional Commits).
• No, this is not a breaking change.

[vbuberen]

I would prefer to revert flutter_lints dependency version than bump min requirements even more. Closing this PR and will create another one with a different version of flutter_lints instead.