Update CHANGELOG for 3.4.17
Update CHANGELOG for 3.4.17

nicklima/sass,xzyfer/sass,MetaAshley/sass,stewx/sass,Andrey-Pavlov/sass,saper/sass,antonifs/sass,modulexcite/sass,hcatlin/sass,Galactix/sass,Andrey-Pavlov/sass,nickg33/sass,zaru/sass,Galactix/sass,srawlins/sass,zaru/sass,ridixcr/sass,srawlins/sass,amitsuroliya/sass,askl56/sass,stewx/sass,Anshdesire/sass,liquidmetal/sass,DanteKaris/sass,Industrys/sass,hcatlin/sass,modulexcite/sass,antonifs/sass,lmetla/sass,xzyfer/sass,StephanieMak/sass,lmetla/sass,nicklima/sass,DanteKaris/sass,MetaAshley/sass,Industrys/sass,ridixcr/sass,rammy7219/sass,Anshdesire/sass,StephanieMak/sass,saper/sass,liquidmetal/sass,rammy7219/sass,jaroot32/sass,jaroot32/sass,amitsuroliya/sass,nickg33/sass,askl56/sass