[Website] add scroll-spy to body in case-studies/baseof.html
[Website] add scroll-spy to body in case-studies/baseof.html

lukecwik/incubator-beam,apache/beam,apache/beam,lukecwik/incubator-beam,chamikaramj/beam,lukecwik/incubator-beam,apache/beam,chamikaramj/beam,lukecwik/incubator-beam,chamikaramj/beam,lukecwik/incubator-beam,chamikaramj/beam,lukecwik/incubator-beam,chamikaramj/beam,apache/beam,chamikaramj/beam,chamikaramj/beam,lukecwik/incubator-beam,apache/beam,chamikaramj/beam,lukecwik/incubator-beam,chamikaramj/beam,chamikaramj/beam,apache/beam,apache/beam,apache/beam,apache/beam,apache/beam,apache/beam,lukecwik/incubator-beam,lukecwik/incubator-beam