Update comment in .gitignore

Author: VeckoTheGecko

.gitignore

@@ -29,5 +29,8 @@ parcels/_version_setup.py
 .pixi
 *.egg-info
 
-# Ignore pixi.lock file for now as Vecko is the only one using pixi for development. This should be checked into VCS if it becomes a more common tool.
+# Ignore pixi.lock file for this project. The con of 22k lines of noise it adds to diffs is not worth
+# the benefit of perfectly reproducible environments for all developers (and all the tooling that would
+# be required to support that - see https://github.com/pydata/xarray/issues/10732#issuecomment-3327780806
+# for more details)
 pixi.lock