Update index.md

Author: kubukoz

_overviews/plugins/index.md

@@ -46,11 +46,10 @@ include:
 - Plugins that alter Scala's behavior around errors and warnings,
   such as [silencer](https://github.com/ghik/silencer), [splain](https://github.com/tek/splain) and [clippy](https://scala-clippy.org/).
 - Plugins that analyze the structure of source code, such as
-  [Sculpt](https://github.com/lightbend/scala-sculpt) and [acyclic](https://github.com/lihaoyi/acyclic).
+  [Sculpt](https://github.com/lightbend/scala-sculpt), [acyclic](https://github.com/lihaoyi/acyclic) and [graph-buddy](https://github.com/VirtusLab/graphbuddy).
 - Plugins that instrument user code to collect information,
   such as the code coverage tool [scoverage](https://github.com/scoverage/scalac-scoverage-plugin).
-- Plugins that add metaprogramming facilities to Scala,
-  such as [Macro Paradise](https://github.com/scalamacros/paradise), [semanticdb](https://scalameta.org/docs/semanticdb/guide.html).
+- Plugins that enable tooling. One such plugin is [semanticdb](https://scalameta.org/docs/semanticdb/guide.html), which enables [scalafix](https://scalacenter.github.io/scalafix/) (a well-known refactoring and linting tool) to do its work. Another one is [Macro Paradise](https://github.com/scalamacros/paradise) (only needed for Scala 2.12).
 - Plugins that modify existing Scala constructs in user code,
   such as [better-monadic-for](https://github.com/oleg-py/better-monadic-for) and [better-tostring](https://github.com/polyvariant/better-tostring).
 - Plugins that add entirely new constructs to Scala by