Updated asciidoc-resources to main

[philipwindecker]

Reference to a related issue in the repository

The used submodule is outdated.
This PR targets that.

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Updates the used asciidoc-resources submodule to be up-to-date with the latest changes at ASAM.
Note that this only has an impact on the Asciidoctor output and not the Antora output.
Thus, the criticality is not that high.

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@pmai

Check the checklist

• I have performed a self-review of my own code/documentation.
• My documentation changes are related to another repository in the organization. Here is the link to the issue/repo.
• My changes generate no new warnings during the documentation generation.
• The existing travis ci which pushes the documentation to gh-pages passes with my changes.