remove required flag from shared-actions param

[msarahan]

This caused existing workflows that do not yet add this parameter to fail. Other workflows did not have this parameter as a required parameter.

These parameters are part of a rework of how shared actions get called. It is described in the readme in https://github.com/rapidsai/shared-actions

[wence-]

Thanks @msarahan

[jameslamb]

Approving in case the answer to my question is "yes this is fine", as it seems that maybe you're trying to unblock CI in some other repo.

But don't we need to supply a default if there are repos out there not passing this configuration? What's going to happen if a null or empty string reaches this?

shared-workflows/.github/workflows/conda-python-build.yaml

Lines 135 to 140 in cb54c1e

	- name: Checkout actions
	uses: actions/checkout@v4
	with:
	repository: ${{inputs.shared_actions_repo}}
	ref: ${{inputs.shared_actions_ref}}
	path: ./shared-actions