chore(docs):[#393] Remove duplicate line

docs/README.md

@@ -23,6 +23,5 @@ the script [build-docs-locally.sh](build-docs-locally.sh) can be used.
 | src/docs/arc42             | The sources for the [IRS Architecture Documentation](https://eclipse-tractusx.github.io/item-relationship-service/docs/arc42) (based on the [arc42](https://www.arc42.de/) template).                                                            |
 | src/docs/security          | Documentation relevant for security assessment.                                                                                                                                                                                                  |
 | src/post-processing        | Some post-processing used by the [GitHub workflow](../.github/workflows/publish-documentation.yaml).                                                                                                                                             |
-| src/post-processing        | Some post-processing used by the [GitHub workflow](../.github/workflows/publish-documentation.yaml).                                                                                                                                             |
 | src/uml-diagrams           | UML diagrams for the documentation                                                                                                                                                                                                               |
 | target                     | The output directory for the documentation build.                                                                                                                                                                                                |