Update command to run specs RSpec instead of Rake

- Make appropriate code changes

.github/workflows/ruby.yml

@@ -2,7 +2,7 @@
 # They are provided by a third-party and are governed by
 # separate terms of service, privacy policy, and support
 # documentation.
-# This workflow will download a prebuilt Ruby version, install dependencies and run tests with Rake
+# This workflow will download a prebuilt Ruby version, install dependencies and run tests with RSpec
 # For more information see: https://github.com/marketplace/actions/setup-ruby-jruby-and-truffleruby
 
 name: Ruby
@@ -35,4 +35,4 @@ jobs:
         ruby-version: ${{ matrix.ruby-version }}
         bundler-cache: true # runs 'bundle install' and caches installed gems automatically
     - name: Run tests
-      run: bundle exec rake
+      run: bundle exec rspec spec

Gemfile

@@ -15,7 +15,3 @@ group :development, :test do
   gem 'pry'
   gem 'rspec'
 end
-
-group :test do
-  gem 'rake'
-end

Gemfile.lock

@@ -75,7 +75,6 @@ GEM
     public_suffix (5.0.5)
     racc (1.8.0)
     rainbow (3.1.1)
-    rake (13.2.1)
     reek (6.3.0)
       dry-schema (~> 1.13.0)
       parser (~> 3.3.0)
@@ -165,7 +164,6 @@ DEPENDENCIES
   fasterer
   flog
   pry
-  rake
   reek
   rspec
   rubocop