fix typo (#8088)

Summary: Pull Request resolved: https://github.com/facebook/rocksdb/pull/8088

Reviewed By: ajkr

Differential Revision: D27270378

Pulled By: zhichao-cao

fbshipit-source-id: 05af12c63855d00cc57bab9866fc8193c03a404e

tools/db_bench_tool.cc

@@ -5677,12 +5677,12 @@ class Benchmark {
     }
   };
 
-  // The social graph wokrload mixed with Get, Put, Iterator queries.
+  // The social graph workload mixed with Get, Put, Iterator queries.
   // The value size and iterator length follow Pareto distribution.
   // The overall key access follow power distribution. If user models the
   // workload based on different key-ranges (or different prefixes), user
   // can use two-term-exponential distribution to fit the workload. User
-  // needs to decides the ratio between Get, Put, Iterator queries before
+  // needs to decide the ratio between Get, Put, Iterator queries before
   // starting the benchmark.
   void MixGraph(ThreadState* thread) {
     int64_t read = 0;  // including single gets and Next of iterators