Update history to reflect merge of #343 [ci skip]

Author: jekyllbot

History.markdown

@@ -26,6 +26,7 @@
   * Fix locale specs that use the fallback locale (#360)
   * style: align with latest jekyll-rubocop (#382)
   * Profile plugin using a third-party repo (#414)
+  * Simplify conditional in SeoTag::Drop#date_modified (#343)
 
 ### Bug Fixes