Update CONTRIBUTING.md
Update CONTRIBUTING.md

@RedXanadu's suggestion

Co-authored-by: Andrew Howe <0991a6d10756c2c5fab6590153618a4c16d6a544@gmail.com>
coreruleset/coreruleset,coreruleset/coreruleset,coreruleset/coreruleset,coreruleset/coreruleset,coreruleset/coreruleset,coreruleset/coreruleset