Use blog.title instead of blog.summary
Use blog.title instead of blog.summary

This also makes it consistent with /blogs/.

Fixes #1403

python/pythondotorg,proevo/pythondotorg,manhhomienbienthuy/pythondotorg,python/pythondotorg,proevo/pythondotorg,python/pythondotorg,manhhomienbienthuy/pythondotorg,python/pythondotorg,proevo/pythondotorg,manhhomienbienthuy/pythondotorg,proevo/pythondotorg,manhhomienbienthuy/pythondotorg