fix changelog

Author: jaeopt

CHANGELOG.md

@@ -1,13 +1,13 @@
 # Optimizely Ruby SDK Changelog
 
 ## 3.4.0
-January 22nd, 2020
+January 23rd, 2020
 
-# New Features
+### New Features:
 - Added a new API to get a project configuration static data.
-  - Call `get_optimizely_config()` to get a snapshot copy of project configuration static data.
+  - Call `get_optimizely_config` to get a snapshot copy of project configuration static data.
   - It returns an `OptimizelyConfig` instance which includes a datafile revision number, all experiments, and feature flags mapped by their key values.
-  - Added caching for `getOptimizelyConfig` - `OptimizelyConfig` object will be cached and reused for the lifetime of the datafile
+  - Added caching for `get_optimizely_config` - `OptimizelyConfig` object will be cached and reused for the lifetime of the datafile
   - For details, refer to a documention page: https://docs.developers.optimizely.com/full-stack/docs/optimizelyconfig-ruby
 
 
@@ -18,7 +18,7 @@ December 13th, 2019
 - BatchEventProcessor will hang on poll after flushing with no event if no event count is greater than 3 [#224](https://github.com/optimizely/ruby-sdk/pull/224).
 - EventDispatcher logs debug response and error responses from http post call i[#221](https://github.com/optimizely/ruby-sdk/pull/221).
 
-# New Features
+### New Features
 - NotificationCenter should accept any Callable [#219](https://github.com/optimizely/ruby-sdk/pull/219).
 
 ## 3.3.1