Update pixi.lock

Benjamin Bertrandrequested to merge
update-pixi into develop
  • Ensure the cpptango env is with python 3.14 (omniorb was rebuilt on osx-arm64 for python 3.14)
  • Update gitattributes for pixi.lock
    • prevent git to show the diff by default
    • update syntax highlightning for gitlab (linguist-language is for github)

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