Fix bad link to RISC-V toolchain

5 jobs for master in 2 minutes and 56 seconds (queued for 4 minutes and 39 seconds)
Status Job ID Name Coverage
  Build
passed #448170
cbuild

00:00:32

 
  Test
passed #448172
test:applications

00:00:13

passed #448171
test:atomic

00:00:03

 
  Hls
passed #448173
catapult_ASIC

00:01:09

passed #448174
catapult_Xilinx

00:00:57