Update pyproject.toml

Author: ddkohler

pyproject.toml

@@ -68,4 +68,4 @@ wt5 = "WrightTools.cli._wt5:cli"
 wt-convert = "WrightTools.cli._units:cli"
 
 [tool.setuptools.dynamic]
-version = {file = "VERSION"}
+version = {file = "WrightTools/VERSION"}