Fix Readme typo for storage crate

[satyambnsal]

There is a typo in storage crate README file. instead of stuct, it should be struct

Pull Request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no API changes)
• Build-related changes
• Documentation content changes
• Other (please describe):

What is the current behavior?

Typo mistake in README content

Issue Number: N/A

What is the new behavior?

Fixed typo mistake

Does this introduce a breaking change?

• Yes
• [ x] No

Other information