Bump @actions/cache to v4.0.2

[robherley]

Description

Updates @actions/cache to v4.0.2:

• cache: wrap create failures in ReserveCacheError toolkit#1966
• cache: prep v4.0.2 release toolkit#1968

I also updated the package manifest versions and updated the release description.

Motivation and Context

Minor bug fixes.

How Has This Been Tested?

See test updates in the toolkit PR:

• cache: wrap create failures in ReserveCacheError toolkit#1966

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation (add or update README or docs)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.