User guide Print page: move tabs to separate pane to eliminate warning

[chalin]

• Splits a tabbed pane that hand two tabs with each language yaml, toml, and json; which was being reported as a warning:

  WARN  Shortcode "tabpane": duplicate tab-persistence key "toml" detected, disabling persistance to avoid multiple tab display. Position: "/Users/chalin/git/lf/docsy/docsy/userguide/content/en/docs/adding-content/print.md:49:1"
  

• Preview: https://deploy-preview-1642--docsydocs.netlify.app/docs/adding-content/print/#disabling-the-toc

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After