Summary:
The default value for `refillPeriodMicros` is `100 * 1000`, which means 100ms (or 100,000us).
The document comments say 100,000ms (equivalent to 100 seconds), which is incorrect and misleading. This PR fixes this typo.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/12832
Reviewed By: cbi42
Differential Revision: D59492336
Pulled By: ajkr
fbshipit-source-id: c2f55a8b996fe078a1510fcbebaea92ec0075929