build: update checkout action to v6 #2041

1. 
   rejected-l commented at 7:17 am on November 24, 2025: none

   Update checkout action to v6. Better credential handling in containers.

   https://github.com/actions/checkout/releases/tag/v6.0.0

2. build: update checkout action to v6 e9ea0eaacd
3. 
   jonatack commented at 2:38 pm on November 24, 2025: member

   Thank you for your proposal. Seems ok, unsure if this update makes a difference for us.
4. jonatack added the label CI on Nov 24, 2025

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rejected-l jonatack

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