Bump pixi version to v0.15.2 (#4) #6

Job	Run time
Check if version changed	5s
build (debian:bookworm-slim)	1m 37s
build (debian:bookworm)	1m 40s
build (debian:bullseye-slim)	1m 31s
build (debian:bullseye)	1m 32s
build (ubuntu:noble)	1m 38s
build (ubuntu:mantic)	1m 33s
build (ubuntu:jammy)	1m 32s
build (ubuntu:focal)	1m 52s
build (nvidia/cuda:12.3.1-base-ubuntu22.04)	1m 37s
build (nvidia/cuda:12.3.1-base-ubuntu20.04)	1m 40s
build (nvidia/cuda:12.2.2-base-ubuntu22.04)	1m 33s
build (nvidia/cuda:12.2.2-base-ubuntu20.04)	1m 42s
build (nvidia/cuda:12.1.1-base-ubuntu22.04)	1m 47s
build (nvidia/cuda:12.1.1-base-ubuntu20.04)	1m 35s
build (nvidia/cuda:11.8.0-base-ubuntu22.04)	1m 31s
build (nvidia/cuda:11.8.0-base-ubuntu20.04)	1m 32s
build (nvidia/cuda:11.7.1-base-ubuntu22.04)	1m 36s
build (nvidia/cuda:11.7.1-base-ubuntu20.04)	1m 32s
build (nvidia/cuda:11.6.2-base-ubuntu20.04)	1m 42s
build (nvidia/cuda:11.4.3-base-ubuntu20.04)	1m 42s
build (nvidia/cuda:11.3.1-base-ubuntu20.04)	1m 42s
build (nvidia/cuda:11.2.2-base-ubuntu20.04)	1m 30s
release	7s
	35m 48s

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