sync upstream Vocabulary markup, correct syntax errors across contexts

[possumbilities]

Description

implements upstream Vocabulary changes from:

• closed the div tag in the default page vocabulary#134
• Fix syntax errors in program-index.html (modify <br> tag and correct ul closing tag) vocabulary#136
• BugFix: Closed open <link> tags in files mentioned in issue #170 vocabulary#175
• [Fix] Includes validation for newsletter form vocabulary#180
• Changed the spelling of Ancilliary to Ancillary vocabulary#214
• closing-anchor-tag-added vocabulary#233
• Br tags closed vocabulary#237
• fix-remove invalid attribute from <article> element-234 vocabulary#240
• Extra spacing is reduced vocabulary#261
• fix/issue-256-hyphen-to-non-breaking vocabulary#281

Technical details

Note: there will be render errors in other areas (see the top menu for example), as this is an ongoing sync across multiple PRs. The Tests below are specifically for the attribution "captions" and their associated renderings.

Tests

• archive-page: https://deploy-preview-76--creativecommons-prototype.netlify.app/context/archive-page.html
• blog-index: https://deploy-preview-76--creativecommons-prototype.netlify.app/context/blog-index.html
• blog-post: https://deploy-preview-76--creativecommons-prototype.netlify.app/context/blog-post.html
• default-page: https://deploy-preview-76--creativecommons-prototype.netlify.app/context/default-page.html
• home-index: https://deploy-preview-76--creativecommons-prototype.netlify.app/context/home-index.html
• person-page: https://deploy-preview-76--creativecommons-prototype.netlify.app/context/person-page.html
• program-index: https://deploy-preview-76--creativecommons-prototype.netlify.app/context/program-index.html
• program-page: https://deploy-preview-76--creativecommons-prototype.netlify.app/context/program-page.html
• search-index: https://deploy-preview-76--creativecommons-prototype.netlify.app/context/search-index.html
• team-index: https://deploy-preview-76--creativecommons-prototype.netlify.app/context/team-index.html
• walkthrough-page: https://deploy-preview-76--creativecommons-prototype.netlify.app/context/walkthrough-page.html

Checklist

• My pull request has a descriptive title (not a vague title like Update index.md).
• My pull request targets the default branch of the repository (main or master).
• My commit messages follow best practices.
• My code follows the established code style of the repository.
• I added or updated tests for the changes I made (if applicable).
• I added or updated documentation (if applicable).
• I tried running the project locally and verified that there are no
  visible errors.

Developer Certificate of Origin

For the purposes of this DCO, "license" is equivalent to "license or public domain dedication," and "open source license" is equivalent to "open content license or public domain dedication."

Developer Certificate of Origin

Developer Certificate of Origin
Version 1.1

Copyright (C) 2004, 2006 The Linux Foundation and its contributors.
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Everyone is permitted to copy and distribute verbatim copies of this
license document, but changing it is not allowed.


Developer's Certificate of Origin 1.1

By making a contribution to this project, I certify that:

(a) The contribution was created in whole or in part by me and I
    have the right to submit it under the open source license
    indicated in the file; or

(b) The contribution is based upon previous work that, to the best
    of my knowledge, is covered under an appropriate open source
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    in the file; or

(c) The contribution was provided directly to me by some other
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