Bump Ruby version to 2.7.4

hsbt · hsbt · commit dcf83f9163a8 · 2021-10-26T12:55:13.000+09:00
diff --git a/Gemfile b/Gemfile
@@ -1,6 +1,6 @@
 source "https://rubygems.org"
 
-ruby "~> 2.7.2"
+ruby "~> 2.7.4"
 
 gem "rake"
 gem "jekyll", "~> 4.0"
diff --git a/Gemfile.lock b/Gemfile.lock
@@ -114,7 +114,7 @@ DEPENDENCIES
   validate-website (~> 1.6)
 
 RUBY VERSION
-   ruby 2.7.2p137
+   ruby 2.7.4p191
 
 BUNDLED WITH
    2.1.4
