Update FoundriesFactory trademark usage

[kprosise]

Trademark should be unregistered, used as proper adjective, and after first occurrence other than in a title or header.

QA: Used linter against source, ran build and linkcheck

This commit addresses FFTK-3431

PR Template and Checklist

Please complete as much as possible to speed up the reviewing process.

Readiness and adding reviewers as appropriate is required.

All PRs should be reviewed by a technical writer/documentation team and a peer.
If effecting customers—which is a majority of content changes—a member of Customer Success must also review.

Readiness

• Merge (pending reviews)
• Merge after date or event
• Draft

Overview

Addresses change requested by Marketing.

Checklist

• Run spelling and grammar check, preferably with linter.
• Avoid changing any header associated with a link/reference.
• Step through instructions (or ask someone to do so).
• Review for wordiness
• Match tone and style of page/section.
• Run make linkcheck.
• View HTML in a browser to check rendering.
• Use semantic newlines.
• follow best practices for commits.
  • Descriptive title written in the imperative.
  • Include brief overview of QA steps taken.
  • Mention any related issues numbers.
  • End message with sign off/DCO line (-s, --signoff).
  • Sign commit with your gpg key (-S, --gpg-sign).
  • Squash commits if needed.
• Request PR review by a technical writer and at least one peer.

Comments

Any thing else that a maintainer/reviewer should know.
This could include potential issues, rational for approach, etc.

[doanac]

Docs for af80c1e are browsable at: https://ci.foundries.io/projects/fio-docs/builds/2732/docs/artifacts/html/index.html

[kprosise]

Vale fails as it is triggered by unrelated errors in all files with changes, which is substantial