ci: set the body-max-line-length rule in commitlint as a warning rather than an error

Author: Deyang-Dai

commitlint.config.js

@@ -1,6 +1,6 @@
 module.exports = {
     extends: ['@commitlint/config-conventional'],
     rules: {
-        'body-max-line-length': [2, 'always', 140],
+        'body-max-line-length': [1, 'always', 140],
     },
 };