What happened:
Currently the site of agones have some issues with box rendering: Warning box: https://agones.dev/site/docs/advanced/allocator-service/

What you expected to happen:
We should ensure all the different boxes we have on the site/ are properly rendered
From {{< alert title="xxx" color="xxx" >}} to {{% alert title="xxx" color="xxx" %}}

A fix has already been done on this info box: #4440 (comment)

How to reproduce it (as minimally and precisely as possible):

Anything else we need to know?:

Environment:

• Agones version:
• Kubernetes version (use kubectl version):
• Cloud provider or hardware configuration:
• Install method (yaml/helm):
• Troubleshooting guide log(s):
• Others: