vendors: add Prismic (#502)

* vendors: add Prismic

Signed-off-by: Patrick Linnane <patrick@linnane.io>

* Update prismic.yaml

Moved plan limit to footnote and included cost above 25 users. Aligned pricing units to vendor page

---------

Signed-off-by: Patrick Linnane <patrick@linnane.io>
Co-authored-by: Daniel Gilmartin <13373548+techdarko@users.noreply.github.com>

_vendors/prismic.yaml

@@ -0,0 +1,9 @@
+---
+base_pricing: $180 per repository/mo[^prismic]
+name: Prismic
+percent_increase: ???
+pricing_source: https://prismic.io/pricing
+sso_pricing: Call us
+footnotes: '[^prismic]: Plan limited to 25 users. Above 25 users price is $750 per repository/mo.'
+updated_at: 2024-07-26
+vendor_url: https://prismic.io