Change docs links to actual file extension (.md)

See https://gerrit-review.googlesource.com/83950 for detailed context.

Change-Id: Ia87ff5d6469c9447af76d82a4086df84b4940ca5
1 file changed
tree: 7c292aa94ebc5b420a511a3b6594ff9dc1f52b25
  1. lib/
  2. src/
  3. .buckconfig
  4. .gitignore
  5. BUCK
  6. LICENSE