Add Actionbase to showcase (#3685)

Author: em3s

docs/src/assets/showcase/actionbase.io.png

@@ -215,4 +215,5 @@ import FluidGrid from './fluid-grid.astro';
 	<Card title="LavaMoat" href="https://lavamoat.github.io/" thumbnail="lavamoat.github.io.png" />
 	<Card title="STACKIT Docs" href="https://docs.stackit.cloud" thumbnail="docs.stackit.cloud.png" />
 	<Card title="CatchIntent" href="https://catchintent.com/docs" thumbnail="catchintent.com.png" />
+	<Card title="Actionbase" href="https://actionbase.io/" thumbnail="actionbase.io.png" />
 </FluidGrid>