Update rake requirement from ~> 10.0 to ~> 12.3

Updates the requirements on [rake](https://github.com/ruby/rake) to permit the latest version.
- [Release notes](https://github.com/ruby/rake/releases)
- [Changelog](https://github.com/ruby/rake/blob/master/History.rdoc)
- [Commits](ruby/rake@v10.5.0...v12.3.3)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Gemfile.lock

@@ -239,7 +239,7 @@ GEM
       forwardable-extended (~> 2.6)
     public_suffix (3.1.1)
     racc (1.6.0)
-    rake (10.5.0)
+    rake (12.3.3)
     rb-fsevent (0.11.0)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
@@ -281,7 +281,7 @@ DEPENDENCIES
   github-pages (~> 207)
   jekyll (~> 3.2)
   jekyll-swiss!
-  rake (~> 10.0)
+  rake (~> 12.3)
 
 BUNDLED WITH
    2.1.4

jekyll-swiss.gemspec

@@ -16,5 +16,5 @@ Gem::Specification.new do |spec|
 
   spec.add_development_dependency "jekyll", "~> 3.2"
   spec.add_development_dependency "bundler", "~> 2.0"
-  spec.add_development_dependency "rake", "~> 10.0"
+  spec.add_development_dependency "rake", "~> 12.3"
 end