fix: exclude /www.bupt.edu.cn/ in htmlproofer check in CI build script.

Author: CptGit

scripts/cibuild.sh

@@ -2,4 +2,4 @@
 set -e # halt script on error
 
 bundle exec jekyll build
-bundle exec htmlproofer --ignore-urls '/www.flaticon.com/,/www.linkedin.com/,/www.freepik.com/' ./_site
+bundle exec htmlproofer --ignore-urls '/www.flaticon.com/,/www.linkedin.com/,/www.freepik.com/,/www.bupt.edu.cn/' ./_site