chore(docs): change license to Apache v2.0

[wax911]

Pull Request Template

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Description

Change license to Apache v2.0

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Enhancement (Improve existing functionality)

IMPORTANT: By submitting a patch, you agree to allow the project
owners to license your work under the terms of the Apache License.