docs: fix broken jenkins ci badge
docs: fix broken jenkins ci badge

jonboulle/rkt,nhlfr/rkt,ybubnov/rkt,jakon89/rkt,kinvolk/rkt,ybubnov/rkt,Wilybald/rkt,jonboulle/rkt,rkt/rkt,rkt/rkt,squeed/rkt,yifan-gu/rocket,yifan-gu/rocket,achanda/rkt,euank/rkt,s-urbaniak/rkt,Shashwatsh/rkt,lucasallan/rkt,rkt/rkt,yifan-gu/rkt,sstabellini/rkt,cab105/rkt,squeed/rkt,euank/rkt,kinvolk/rkt,kinvolk/rkt,dgonyeo/rkt,yifan-gu/rocket,dgonyeo/rkt,achanda/rkt,cab105/rkt,intelsdi-x/rkt,Wilybald/rkt,intelsdi-x/rkt,shobhit85/rkt,s-urbaniak/rkt,Wilybald/rkt,ybubnov/rkt,lucasallan/rkt,coreos/rkt,euank/rkt,jakon89/rkt,joshix/rkt,Shashwatsh/rkt,joshix/rkt,s-urbaniak/rkt,joshix/rkt,nhlfr/rkt,shobhit85/rkt,dgonyeo/rkt,rkt/rkt,joshix/rkt,yifan-gu/rkt,sstabellini/rkt,yifan-gu/rkt,alban/rkt,squeed/rkt,sstabellini/rkt,lucasallan/rkt,jonboulle/rkt,kinvolk/rkt,jakon89/rkt,Shashwatsh/rkt,coreos/rkt,lucasallan/rkt,achanda/rkt,coreos/rkt,cab105/rkt,alban/rkt,intelsdi-x/rkt,nhlfr/rkt,Wilybald/rkt,alban/rkt,shobhit85/rkt