Fix netCDF library, otherwise the package can not be installed

Author: isteinbrecher

pyproject.toml

@@ -12,7 +12,7 @@ readme = "README.md"
 license = "MIT"
 dependencies = [
   "execnet==1.9.0",
-  "netCDF4",
+  "netCDF4==1.7.3",
   "numpy",
   "fourcipp"
 ]