Document and tune markdown link checking

Author: JohT

README.md

@@ -125,6 +125,7 @@ The [Code Structure Analysis Pipeline](./.github/workflows/java-code-analysis.ym
   - [openTSNE](https://github.com/pavlin-policar/openTSNE)
   - [wordcloud](https://github.com/amueller/word_cloud)
 - [Graph Visualization](./graph-visualization/README.md) uses [node.js](https://nodejs.org/de) and the dependencies listed in [package.json](./graph-visualization/package.json).
+- [Check links in markdown documentation (GitHub workflow)](./.github/workflows/check-links-in-documentation.yml) uses [markdown-link-check](https://github.com/tcort/markdown-link-check).
 
 **Big shout-out** 📣 to all the creators and contributors of these great libraries 👍. Projects like this wouldn't be possible without them. Feel free to [create an issue](https://github.com/JohT/code-graph-analysis-pipeline/issues/new/choose) if something is missing or wrong in the list.
 

markdown-lint-check-config.json

@@ -4,5 +4,9 @@
             "pattern": "^http://localhost"
         }
     ],
+    "timeout": "30s",
+    "retryOn429": true,
+    "retryCount": 3,
+    "fallbackRetryDelay": "60s",  
     "aliveStatusCodes": [200, 202, 206]
 }