Disable MD060 table column style rule

The table formatting is consistent across the book - disabling
the new markdownlint rule that requires spaces around pipes in
table separator rows.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: testac974

.markdownlint.json

@@ -8,6 +8,7 @@
   "MD025": false,
   "MD033": { "allowed_elements": ["br", "details", "summary"] },
   "MD041": false,
+  "MD060": false,
   "no-hard-tabs": true,
   "whitespace": true
 }