Update blizzard.txt-blizzard.gcdn.cloudn.co.kr

[dowson521]

What CDN does this PR relate to

Does this require running via sniproxy

Capture method

Testing Scenario

Testing Configuration

<!-- Paste either your docker run command from the DNS container OR explain how you have setup DNS zone files etc to test this issue -->

Sniproxy output

Please paste the output from docker logs <sniproxy container name/id> | sed 's/.*\:443 \[//;s/\].*//' | sort | uniq -c below

<!-- If you are running sniproxy paste the output to the following command
docker logs <sniproxy container name/id> | sed 's/.*\:443 \[//;s/\].*//' | sort | uniq -c
-->

[dowson521]

OK