Add markdown link check workflow 4

.github/markdown-link-check-config.json

@@ -3,10 +3,6 @@
     {
       "pattern": "^https://www.linkedin.com/in/eduardomserrano/",
       "description": "Linkedin returns 999, can't figure out how to make this work past Linkedin's 'are you a human?' check."
-    },
-    {
-      "pattern": "^https://blog.tersmitten.nl/slugify/",
-      "description": "Returns a 400. Probably need some headers to get a 200."
     }
   ],
   "replacementPatterns": [

README.md

@@ -61,7 +61,7 @@ A Docker container [GitHub action](https://docs.github.com/en/actions/learn-gith
 **Notes about the JSON output:**
 
 - The keys on the JSON object are id field of the template form element.
-- Checkboxes form elements are outputed as an object whose keys are the [slugified]((https://blog.tersmitten.nl/slugify/)) value of the label of the option.
+- Checkboxes form elements are outputed as an object whose keys are the [slugified](https://blog.tersmitten.nl/slugify/) value of the label of the option.
 - When the form element is optional and no input is provided for the form element then the issue form body will contain a `_No response_` but the parsed output for that key in the JSON string will just be an empty value.
 - **For a better understanding of the output rules see example below.**