Update Readme with new Tag v0.18.1

Signed-off-by: Sascha Schwarze <[email protected]>

Author: github-actions[bot]

README.md

@@ -172,6 +172,7 @@ To find out more on what's the best strategy or what else can Shipwright do for
 | Version                                                                | Docs                                                                       | Examples                                                                          |
 |------------------------------------------------------------------------|----------------------------------------------------------------------------|-----------------------------------------------------------------------------------|
 | HEAD                                                                   | [Docs @ HEAD](docs/README.md)                                              | [Examples @ HEAD](samples)                                                        |
+| [v0.18.1](https://github.com/shipwright-io/build/releases/tag/v0.18.1)    | [Docs @ v0.18.1](https://github.com/shipwright-io/build/tree/v0.18.1/docs) | [Examples @ v0.18.1](https://github.com/shipwright-io/build/tree/v0.18.1/samples) |
 | [v0.17.4](https://github.com/shipwright-io/build/releases/tag/v0.17.4)    | [Docs @ v0.17.4](https://github.com/shipwright-io/build/tree/v0.17.4/docs) | [Examples @ v0.17.4](https://github.com/shipwright-io/build/tree/v0.17.4/samples) |
 | [v0.17.3](https://github.com/shipwright-io/build/releases/tag/v0.17.3)    | [Docs @ v0.17.3](https://github.com/shipwright-io/build/tree/v0.17.3/docs) | [Examples @ v0.17.3](https://github.com/shipwright-io/build/tree/v0.17.3/samples) |
 | [v0.17.2](https://github.com/shipwright-io/build/releases/tag/v0.17.2)    | [Docs @ v0.17.2](https://github.com/shipwright-io/build/tree/v0.17.2/docs) | [Examples @ v0.17.2](https://github.com/shipwright-io/build/tree/v0.17.2/samples) |