chore: fix markdown lint (#2742)

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Author: tac0turtle

docs/learn/config.md

@@ -28,7 +28,6 @@ This document provides a comprehensive reference for all configuration options a
   - [DA Header Namespace](#da-namespace)
   - [DA Data Namespace](#da-data-namespace)
   - [DA Block Time](#da-block-time)
-  - [DA Start Height](#da-start-height)
   - [DA Mempool TTL](#da-mempool-ttl)
 - [P2P Configuration (`p2p`)](#p2p-configuration-p2p)
   - [P2P Listen Address](#p2p-listen-address)

tools/da-debug/README.md

@@ -63,7 +63,9 @@ da-debug search 100 "0x000000000000000000000000000000000000000000000000000000746
 
 All commands support these global flags:
 
+<!-- markdown-link-check-disable -->
 - `--da-url string`: DA layer JSON-RPC URL (default: "http://localhost:7980")
+<!-- markdown-link-check-enable -->
 - `--auth-token string`: Authentication token for DA layer
 - `--timeout duration`: Request timeout (default: 30s)
 - `--verbose`: Enable verbose logging