Change docs links to actual file extension (.md)

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

Change-Id: I1bea408d1be78875debd98b7f7f71a22835f6866
1 file changed
tree: 9e53f2c48b35ae5efbf51f7718b0d6987e75c745
  1. src/
  2. .gitignore
  3. BUCK
  4. LICENSE
  5. pom.xml