chore(docs): remove mention of useWorkspaces

[kevinji]

Description

useWorkspaces has been removed since 7.0.0 and should not be mentioned.

Motivation and Context

Mentioning useWorkspaces is confusing as it has been removed.

How Has This Been Tested?

N/A

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)
• Chore (change that has absolutely no effect on users)

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.

[nx-cloud]

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✅ Successfully ran 7 targets

• nx run-many --t e2e --parallel=1
• nx run-many -t lint --parallel=3
• nx run-many -t test --parallel=3 --ci --maxWorkers=2
• nx run integration:integration --ci --maxWorkers=2
• nx run-many -t build --parallel=3
• nx-cloud record -- npx nx format:check
• nx run-many -t test --parallel=3 --ci --maxWorkers=2 --testTimeout=60000 --testPathIgnorePatterns=save.spec.ts --testPathIgnorePatterns=find-file.spec.ts --testPathIgnorePatterns=chain-class.spec.ts

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[kevinji]

@JamesHenry anything else that needs to be updated other than the change you made?

[JamesHenry]

Thank you @kevinji