Reformat CONTRIBUTING.md to use LF instead of CRLF
Reformat CONTRIBUTING.md to use LF instead of CRLF

MichaelMaar/concrete5,TimDix/concrete5,TimDix/concrete5,TimDix/concrete5,avdevs/concrete5,MichaelMaar/concrete5,matt9mg/concrete5,MichaelMaar/concrete5,matt9mg/concrete5,avdevs/concrete5,matt9mg/concrete5,avdevs/concrete5