docs: fix typos in workspaces documentation

[alejsdev]

What does this PR do?

fix typos in docs/pm/workspaces.mdx

How did you verify your code works?

no code changes were made

[coderabbitai]

Walkthrough

This PR corrects minor documentation errors in the workspaces guide, including a grammar fix changing "it's" to "its" and removing an extra comma and space in a punctuation pattern.

Changes

Cohort / File(s)	Change Summary
Documentation Updates docs/pm/workspaces.mdx	Fixed grammar error ("it's" → "its") and removed extra comma and space in the "Run scripts in multiple packages" section

Pre-merge checks

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately summarizes the main change: fixing typos in workspaces documentation, which directly matches the changeset.
Description check	✅ Passed	The pull request description follows the required template with both sections completed: 'What does this PR do?' and 'How did you verify your code works?' are present and appropriately filled.

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[robobun]

Thanks for the fixes. Both of these have since been corrected on main in docs/pm/workspaces.mdx: the doubled comma was removed in e7f2bfd (#28788) and "it's own" became "its own" in 16a7269 (#33112). There is nothing left for this PR to apply, so closing it.