docs: mention kafl.action in the components

Author: Wenzel

Diff for: docs/source/index.md

@@ -26,6 +26,7 @@ The project is structured around multiple components:
 - [`IntelLabs/kafl.qemu`](https://github.com/IntelLabs/kafl.qemu): Modified QEMU with fast-snapshots support
 - [`IntelLabs/kafl.libxdc`](https://github.com/IntelLabs/kafl.libxdc): Fast Intel PT decoding library
 - [`IntelLabs/kafl.targets`](https://github.com/IntelLabs/kafl.targets): Example kAFL targets
+- [`IntelLabs/kafl.actions`](https://github.com/IntelLabs/kafl.actions): Github Action for CI/CD integration
 
 ## Contents