Updates link check configuration (#207)

Refines the link check configuration to improve reliability and accuracy.

Removes retry logic and adds 429 to the list of accepted status codes.

Author: edumserrano

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

@@ -21,7 +21,5 @@
       "description": "Avoids 403s from GitHub docs"
     }
   ],
-  "retryOn429": true,
-  "retryCount": 3,
-  "fallbackRetryDelay": "3s"
+  "aliveStatusCodes": [429, 200]
 }