inappropriate diameters for Spherachute hemisphericals

https://github.com/openrocket/openrocket/blob/f9c34ebb461e2a681cc4071883b56ee88cf7fade/core/src/main/resources/datafiles/components/internal/Spherachutes_Parachutes.orc#L137

All of the hemispherical diameters should be changed to the nominal diameter to match the Cd.
