CHANGELOG.md in benchmark_driver-0.5.0 vs CHANGELOG.md in benchmark_driver-0.5.1

@@ -1,4 +1,8 @@
+# v0.5.1
+
+- Fix a bug that fails to run multiple Ruby binaries when multiple YAML files are specified
+
 # v0.5.0
 
 - Automatic bundle install for each Ruby executable on `--bundler` or `--bundle`
 - CLI error handling is improved for empty/invalid arguments