Add `{{ stdlib("c") }}`

[jakirkham]

Currently this uses {{ compiler("c") }}, but does not yet include {{ stdlib("c") }}

https://github.com/conda-forge/miktex-feedstock/blob/9c224b2bd25e549eb97bbcb44a83b6c4ae6166dc/recipe/meta.yaml#L31-L37

Raising to track adding it here

[jakirkham]

@conda-forge-admin , please re-render

[conda-forge-webservices[bot]]

Hi! This is the friendly automated conda-forge-webservice.

I just wanted to let you know that I started rerendering the recipe in conda-forge/miktex-feedstock#33.