battlenet: Add shortcut

[RavenMacDaddy]

Noticed this wasn't part of the newest manifest.

• [x] I have read the Contributing Guide.

[github-actions[bot]]

All changes look good.

Wait for review from human collaborators.

battlenet

• [x] Description
• [x] License
• [x] Hashes
• [x] Checkver
• [x] Autoupdate