v3.6.2

Security:

• Fix Gem::SafeMarshal buffer overrun when given lengths larger than fit
  into a byte. Pull request
  #8305 by segiddins
• Improve type checking in marshal_load methods. Pull request
  #8306 by segiddins

Enhancements:

• Skip rdoc hooks and their tests on newer rdoc versions. Pull request
  #8340 by
  deivid-rodriguez
• Installs bundler 2.6.2 as a default gem.

Bug fixes:

• Fix serialized metadata including an empty @original_platform
  attribute. Pull request
  #8355 by
  deivid-rodriguez