Replace build for python-build in environment.yml

The `build` package in `conda-forge` is outdated, `python-build` should
be used instead.

environment.yml

@@ -15,7 +15,7 @@ dependencies:
     - python-xxhash>=1.4.3  # in conda-forge python-xxhash is the python pkg
     - xxhash # this is the xxHash library in conda-forge
     # Build
-    - build
+    - python-build
     # Test
     - pytest
     - pytest-cov