Bump pixi version to v0.39.0 #84

Job	Run time
Check if version changed	4s
build (debian:bookworm-slim)	3m 7s
build (debian:bookworm)	3m 9s
build (debian:bullseye-slim)	3m 25s
build (debian:bullseye)	3m 7s
build (ubuntu:noble)	3m 19s
build (ubuntu:mantic)	3m 13s
build (ubuntu:jammy)	3m 22s
build (ubuntu:focal)	3m 7s
build (nvidia/cuda:12.3.1-base-ubuntu22.04)	3m 10s
build (nvidia/cuda:12.3.1-base-ubuntu20.04)	3m 14s
build (nvidia/cuda:12.2.2-base-ubuntu22.04)	3m 8s
build (nvidia/cuda:12.2.2-base-ubuntu20.04)	3m 13s
build (nvidia/cuda:12.1.1-base-ubuntu22.04)	3m 20s
build (nvidia/cuda:12.1.1-base-ubuntu20.04)	3m 27s
build (nvidia/cuda:11.8.0-base-ubuntu22.04)	3m 16s
build (nvidia/cuda:11.8.0-base-ubuntu20.04)	3m 21s
build (nvidia/cuda:11.7.1-base-ubuntu22.04)	3m 8s
build (nvidia/cuda:11.7.1-base-ubuntu20.04)	3m 9s
build (nvidia/cuda:11.6.2-base-ubuntu20.04)	3m 7s
build (nvidia/cuda:11.4.3-base-ubuntu20.04)	3m 13s
build (nvidia/cuda:11.3.1-base-ubuntu20.04)	3m 25s
build (nvidia/cuda:11.2.2-base-ubuntu20.04)	3m 6s
release	0s
	1h 11m 10s

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