Bump java buildpack submodule [#46842625]

Bump buildpacks/vendor/java:

Alex Suraci and Pieter Noordhuis (1):
      VCAP_APP_PORT -> PORT

Bleicke & Mark Rushakoff (5):
      Refactor web_xml_config
      Remove nokogiri includes
      Revert "Remove nokogiri includes"
      Replace nokogiri with REXML
      Remove nokogiri references [#46842625]

Bleicke, Mark Rushakoff & Matthew Boedicker (1):
      WIP, replaced nokogiri with REXML, tests green

Kowshik Prakasam and Maria Shaldibina (2):
      Use cached JRE
      Return fetched file path