[pyproject] Update pixi to 0.19.1 (use name from project.name)

pixi.lock

@@ -571,9 +571,9 @@ packages:
   timestamp: 1698833765762
 - kind: pypi
   name: clapper
-  version: 1.0.2.dev20+g25f7b76.d20240408
+  version: 1.0.2.dev21+gee1b382.d20240416
   path: .
-  sha256: 2a52808438c38dec29548f420e4c5ca85f545d9f494a8216e789433a21faadd2
+  sha256: d57f85a529283de372e0eacf05d41aa0bccc5b0a9608b6db12f17a8ac0ff8fe1
   requires_dist:
   - click >=8
   - tomli

pyproject.toml

@@ -56,7 +56,6 @@ verbose-config = "tests.data.verbose_config"
 error-config = "tests.data.doesnt_exist"
 
 [tool.pixi.project]
-name = "clapper"
 channels = ["conda-forge"]
 platforms = ["linux-64", "osx-arm64"]