Fix RangeError on the SheetPageWithLazyList of the playground_navigator2 .

[ksokolovskyi]

Description

This PR fixes a RangeError appearing on the SheetPageWithLazyList of the playground_navigator2 .

Related Issues

Fixes: #117

Checklist

Before you create this PR confirm that it meets all requirements listed below by checking the relevant checkboxes ([x]).
This will ensure a smooth and quick review process.

• I read the Contributor Guide and followed the process outlined there for submitting PRs.
• My PR includes tests for all changed/updated/fixed behaviors.
• All existing and new tests are passing.
• I updated/added relevant documentation (doc comments with ///).
• The analyzer (melos run analyze) does not report any problems on my PR.
• The package compiles with the minimum Flutter version stated in the pubspec.yaml

Breaking Change

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

• Yes, this is a breaking change.
• No, this is not a breaking change.

[ulusoyca]

Thanks for the fix!

[ksokolovskyi]

@ulusoyca, thanks for the review!