Change docs links to actual file extension (.md)

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

Change-Id: Id9dfcd79704d1315d646b800c82c3b5818416836
2 files changed
tree: 0d39abf7eae8f0675f5df65cf9a2a9c9d5eb9428
  1. .buckconfig
  2. .gitignore
  3. .settings/
  4. BUCK
  5. LICENSE
  6. VERSION
  7. lib/
  8. src/