Fixes hardcoded pip version
Fixes hardcoded pip version

Uses default Python executable so correct version of pip gets picked up dynamically

rnixx/buildozer,rnixx/buildozer,kivy/buildozer,kivy/buildozer,kivy/buildozer,inclement/buildozer,inclement/buildozer,inclement/buildozer,kivy/buildozer,rnixx/buildozer,rnixx/buildozer,inclement/buildozer