ci: fix typo

Author: jonas-eschle

.github/workflows/publish_to_pypi.yml

@@ -21,7 +21,7 @@ jobs:
 
             - name: Install dependencies
               run: |
-                  uv pip install .[dev]
+                  uv pip install --system .[dev]
             - name: Publish hep_ml to PyPi
               env:
                   TWINE_USERNAME: "__token__"

.gitignore

@@ -57,6 +57,7 @@ docsrc/tmp*
 
 # OS X garbage
 .DS_Store
+/hep_ml/_version.py
 
 # version file
 /hep_ml/_version.py