Update external-integrations.md

Added multiple integrations found on Scaladex: https://index.scala-lang.org/search?q=munit

docs/integrations/external-integrations.md

@@ -6,6 +6,13 @@ title: External Integrations
 Feel free to add your project to this list by submitting a pull request
 [here](https://github.com/scalameta/munit/blob/main/docs/integrations/external-integrations.md).
 
-- [munit-snapshot](https://github.com/lolgab/munit-snapshot): Snapshot testing for MUnit.
-- [munit-cats-effect](https://github.com/typelevel/munit-cats-effect)
-- [discipline-munit](https://github.com/typelevel/discipline-munit)
+- [discipline-munit](https://github.com/typelevel/discipline-munit): MUnit binding for Typelevel Discipline
+- [http4s-munit](https://github.com/alejandrohdezma/http4s-munit): Integration library between MUnit and http4s
+- [munit-cats-effect](https://github.com/typelevel/munit-cats-effect): Integration library for MUnit & cats-effect
+- [munit-snapshot](https://github.com/lolgab/munit-snapshot): Snapshot testing for MUnit
+- [munit-zio](https://github.com/poslegm/munit-zio): MUnit and ZIO integration
+- [pact4s](https://github.com/jbwheatley/pact4s): Consumer driven contract testing
+- [sbt-scripted-munit](https://github.com/alejandrohdezma/sbt-scripted-munit): SBT plugin to enable using MUnit to test your SBT plugins
+- [scala-hedgehog](https://github.com/hedgehogqa/scala-hedgehog): Release with confidence, state-of-the-art property testing for Scala
+- [tapir-golden-openapi-munit](https://github.com/alejandrohdezma/tapir-golden-openapi-munit): Golden testing for Tapir endpoints using MUnit
+- [testcontainers-scala](https://github.com/testcontainers/testcontainers-scala): Docker containers for testing in scala