[rubygems/rubygems] Use OpenSSL::Digest instead of digest stdlib

https://github.com/rubygems/rubygems/commit/69aa007679

spec/bundler/bundler/digest_spec.rb

@@ -1,12 +1,12 @@
 # frozen_string_literal: true
 
-require "digest"
+require "openssl"
 require "bundler/digest"
 
 RSpec.describe Bundler::Digest do
   context "SHA1" do
     subject { Bundler::Digest }
-    let(:stdlib) { ::Digest::SHA1 }
+    let(:stdlib) { OpenSSL::Digest::SHA1 }
 
     it "is compatible with stdlib" do
       random_strings = ["foo", "skfjsdlkfjsdf", "3924m", "ldskfj"]