Fix spelling in benchmarking.md

Author: mtrofin

docs/benchmarking.md

@@ -150,7 +150,7 @@ To generate custom test descriptions for gtest executables (ie the test
 executables that are used by chromium), you can use the `list_gtests.py` script.
 This script doesn't need to be used for running the chromium performance tests
 unless you are interested in adjusting the currently set test descriptions
-availble in `/compiler_opt/benchmark/chromium_test_descriptions` or are
+available in `/compiler_opt/benchmark/chromium_test_descriptions` or are
 interested in using tests from a different project that also uses gtest.
 
 Example:
@@ -184,4 +184,4 @@ PYTHONPATH=$PYTHONPATH:. python3 ./compiler_opt/benchmark/benchmark_report_conve
 --out=reports.csv
 ```
 This will create `reports.csv` with a line for each test thhat contains information
-about the differences in performance counters for that specific test.
+about the differences in performance counters for that specific test.