Change docs links to actual file extension (.md)

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

Change-Id: Iec8e8974c96df9f7849dcac92a2e623e80c7175f
2 files changed
tree: 3f2fdc075a6f95336fb31fc052047a36d9d1c5d6
  1. .settings/
  2. lib/
  3. src/
  4. .buckconfig
  5. .gitignore
  6. BUCK
  7. LICENSE
  8. pom.xml