Fixing missing tables for pricing themes

Why is this change being made?

https://about.gitlab.com/features/by-theme/ is powered with data from data/pricing_themes.yml and features.yml. The pricing_theme field is case-sensitive, and the items that were meant to be listed under Value stream analytics and Free guest users had some incorrect capitalization, which was making those tables emtpy.

Author Checklist

  • Provided a concise title for the MR
  • Added a description to this MR explaining the reasons for the proposed change, per say-why-not-just-what
  • Assign this change to the correct DRI
    • If the DRI for the page/s being updated isn’t immediately clear, then assign it to one of the people listed in the "Maintained by" section in on the page being edited.
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    • If the changes relate to any part of the project other than updates to content and/or data files please make sure to ping @gl-static-site-editor in a comment for a review and merge. For example changes to .gitlab-ci.yml, JavaScript/CSS/Ruby code or the layout files. (this requirement has been removed pending identification of a new DRI for the handbook)

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