Run PNPM install for catalogs rather than update

[robaiken]

What are you trying to accomplish?

When updating PNPM workspace catalogs, we need to use pnpm install to update the lockfile instead of pnpm update. This ensures proper handling of workspace dependencies when making catalog-wide updates.

Anything you want to highlight for special attention from reviewers?

This approach ensures that workspace updates use the correct PNPM command while maintaining existing behavior for regular package updates.

How will you know you've accomplished your goal?

1. Running pnpm update in a workspace project - should correctly update the lockfile using install
2. Running pnpm update in a regular project - should use the normal update+install flow
3. Checking that lockfiles are generated correctly in both scenarios

Checklist

• I have run the complete test suite to ensure all tests and linters pass.
• I have thoroughly tested my code changes to ensure they work as expected, including adding additional tests for new functionality.
• I have written clear and descriptive commit messages.
• I have provided a detailed description of the changes in the pull request, including the problem it addresses, how it fixes the problem, and any relevant details about the implementation.
• I have ensured that the code is well-documented and easy to understand.