Docs / Encyclopedia: Adds JAMStack entry. (#20456)
Docs / Encyclopedia: Adds JAMStack entry. (#20456)

* Docs / Encyclopedia: Adds JAMStack entry.

Updated glossary, sidebar with links to JAMStack entry.

* glossary/jamstack: Cleaned up some grammar and phrasing.

* Docs / Encyclopedia: Adds JAMStack entry.

Updated glossary, sidebar with links to JAMStack entry.

* glossary/jamstack: Cleaned up some grammar and phrasing.

* Update docs/docs/glossary/jamstack.md

Co-Authored-By: Aisha Blake <aisha@gatsbyjs.com>

* Add more about the advantages of the JAMStack.

Speed, security, developer experience, and flexibility.
Added a proper conclusion.

* Add link to /features/.

* Make links relative & change three to four (advantages)

Co-authored-by: Aisha Blake <e0b0dda0a9e0d5d575159802d44d0f5f5c2978c9@gmail.com>

ilcm96/ilcm96.github.io