chore(deps): update davidanson/markdownlint-cli2-action action to v20

README.md

@@ -6,5 +6,5 @@ This project contains all sources to build the container image `git.cryptic.syst
 primary goal of this project is to package the binary `markdownlint-ci` as container image. The source code of the
 binary can be found in the upstream project of [igorshubovych](https://github.com/igorshubovych/markdownlint-cli).
 
-The workflow or how `markdownlint-ci` can be used is pretty good
-[documented](https://github.com/igorshubovych/markdownlint-cli#usage).
+The workflow or how `markdownlint-ci` can in general be used is documented
+[here](https://github.com/igorshubovych/markdownlint-cli#usage).