CCM-11029: fix github token script

Author: harrim91

scripts/set_github_token.sh

@@ -2,6 +2,8 @@
 
 set -euo pipefail
 
+cd "$(git rev-parse --show-toplevel)"
+
 npm config --location user set @nhsdigital:registry https://npm.pkg.github.com
 
 npm config ls -l | grep '/npm.pkg.github.com/:_authToken' -q && echo "Github token already exists" && exit 0