Update lab04.md
Update lab04.md
ucsb-cmptgcs-1a-f17/ucsb-cmptgcs-1a-f17.github.io,ucsb-cmptgcs-1a-f17/ucsb-cmptgcs-1a-f17.github.io,ucsb-cmptgcs-1a-f17/ucsb-cmptgcs-1a-f17.github.io,UCSB-CMPTGCS-1A-F16/UCSB-CMPTGCS-1A-F16.github.io,UCSB-CMPTGCS-1A-F16/UCSB-CMPTGCS-1A-F16.github.io,UCSB-CMPTGCS-1A-F16/UCSB-CMPTGCS-1A-F16.github.io,ucsb-cmptgcs-1a-f17/ucsb-cmptgcs-1a-f17.github.io,ucsb-cmptgcs-1a-f17/ucsb-cmptgcs-1a-f17.github.io,ucsb-cmptgcs-1a-f17/ucsb-cmptgcs-1a-f17.github.io,UCSB-CMPTGCS-1A-F16/UCSB-CMPTGCS-1A-F16.github.io