Ignore versioning cache

.gitignore

@@ -9,7 +9,7 @@ _version.py
 __pycache__
 
 # ignore version cache file (generated automatically when setup.py is run)
-ctapipe/_version_cache.py
+src/ctapipe_io_nectarcam/_version_cache.py
 
 # Ignore .c files by default to avoid including generated code. If you want to
 # add a non-generated .c extension, use `git add -f filename.c`.