Fix lychee link checker exclude-path regex patterns

Convert glob patterns to valid regex patterns:
- Change '**/meta.json' to '.*/meta\.json$'
- Change '**/meta.cn.json' to '.*/meta\.cn\.json$'

This fixes the GitHub Actions "Check Links" workflow failure caused by
invalid regex syntax. The ** glob pattern was being interpreted as a
regex repetition operator without an expression.

Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>

Author: Copilot

.github/workflows/check-links.yml

@@ -26,8 +26,8 @@ jobs:
           # Use configuration file for path remapping and settings
           args: >-
             --config lychee.toml
-            --exclude-path '**/meta.json'
-            --exclude-path '**/meta.cn.json'
+            --exclude-path '.*/meta\.json$'
+            --exclude-path '.*/meta\.cn\.json$'
             'content/**/*.md'
             'content/**/*.mdx'
             'README.md'