WRR-393: Update default height of bottom pannel in enact storybook

[dongsuwon]

Enact-DCO-1.0-Signed-off-by: Dongsu Won (dongsu.won@lgepartner.com)

Checklist

• [x] I have read and understand the contribution guide
• [ ] A CHANGELOG entry is included
• [ ] At least one test case is included for this feature or bug fix
• [x] Documentation was added or is not needed
• [ ] This is an API breaking change

Issue Resolved / Feature Added

The height of addons bottom panel has changed as the storybook has been updated to 8.0. So we need to fix height of addons bottom panel.

Resolution

Fix height of addons bottom panel.

Additional Considerations

This PR is basically the same with https://github.com/enactjs/sandstone/pull/1666.

Links

WRR-393

Comments

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 82.27%. Comparing base (fcb7e6a) to head (31e64c0). Report is 2 commits behind head on develop.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #3271 +/- ## ======================================== Coverage 82.27% 82.27% ======================================== Files 152 152 Lines 7090 7090 Branches 1866 1866 ======================================== Hits 5833 5833 Misses 986 986 Partials 271 271 ```

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