feat: bump up Ruby to 2.7.8.

Author: feedforce-bot

ruby-2.7.spec

@@ -1,5 +1,5 @@
 Name: ruby
-Version: 2.7.7
+Version: 2.7.8
 Release: 1%{?dist}
 License: Ruby License/GPL - see COPYING
 URL: http://www.ruby-lang.org/
@@ -67,6 +67,9 @@ rm -rf $RPM_BUILD_ROOT
 
 %changelog
 
+* Thu Mar 30 2023 feedforce tech team <technical_staff@feedforce.jp> - 2.7.8
+- Update ruby version to 2.7.8
+
 * Thu Nov 24 2022 feedforce tech team <technical_staff@feedforce.jp> - 2.7.7
 - Update ruby version to 2.7.7