docs: rename premium plugins to enterprise plugins (#21222)
docs: rename premium plugins to enterprise plugins (#21222)

* rename premium plugins to enterprise plugins

* Update docs/sources/enterprise/_index.md

Co-Authored-By: Diana Payton <ee24b2c2426ceb8f7f9d3f1e01be1306fa31b8a1@users.noreply.github.com>

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