readme.md - Change help that was referring to ipc_dfn_qfn_generator.p…
…y to be ipc_noLead_generator.py
Rename of the script was done in https://github.com/pointhi/kicad-footprint-generator/commit/d900531a90503bba4b990191b0b2382b7b02ce4e
Edited by Joel Guittet