fix typos in quick start doc

License: MIT
Signed-off-by: Jeromy <jeromyj@gmail.com>

test/sharness/lib/test-lib-hashes.sh

 # this file defines several useful hashes used across the test codebase.
 # thus they can be defined + changed in one place
 
-HASH_WELCOME_DOCS="QmXarR6rgkQ2fDSHjSY5nM2kuCXKYGViky5nohtwgF65Ec"
+HASH_WELCOME_DOCS="QmYwAPJzv5CZsnA625s3Xf2nemtYgPpHdWEz79ojWnPbdG"
 HASH_GATEWAY_ASSETS="QmXB7PLRWH6bCiwrGh2MrBBjNkLv3mY3JdYXCikYZSwLED"
 HASH_HELP_PAGE="QmY5heUM5qgRubMDD1og9fhCPA6QdkMp3QCwd4s7gJsyE7"
 HASH_EMPTY_DIR="QmUNLLsPACCz1vLxQVkXqqLX5R1X345qqfHbsf67hvA3Nn"