[rubygems/rubygems] Fix out of date spec description

https://github.com/rubygems/rubygems/commit/71fd896041

spec/bundler/commands/install_spec.rb

@@ -1067,7 +1067,7 @@ RSpec.describe "bundle install with gem sources" do
       G
     end
 
-    it "should display a proper message to explain the problem" do
+    it "should still work" do
       bundle "config set --local path vendor"
       bundle :install
       expect(out).to include("Bundle complete!")