Fixed mangled lists in C++ guide

[akremsa]

This PR is related to #1379

Now it looks like this:

Closes #1379

[akremsa]

/assign @pooneh-m

[agones-bot]

Build Succeeded 👏

Build Id: da6c3958-8a79-4c09-8b60-65f71aad3267

The following development artifacts have been built, and will exist for the next 30 days:

• image: gcr.io/agones-images/agones-controller:1.5.0-a5abb95
• image: gcr.io/agones-images/agones-sdk:1.5.0-a5abb95
• image: gcr.io/agones-images/agones-ping:1.5.0-a5abb95
• Linux C++ SDK (build): agonessdk-1.5.0-a5abb95-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-1.5.0-a5abb95.zip

A preview of the website (the last 30 builds are retained):

• https://a5abb95-dot-preview-dot-agones-images.appspot.com/

To install this version:

• git fetch https://github.com/GoogleCloudPlatform/agones.git pull/1393/head:pr_1393 && git checkout pr_1393
• helm install ./install/helm/agones --namespace agones-system --name agones --set agones.image.tag=1.5.0-a5abb95

[aLekSer]

Thanks, now it looks much better.

[google-oss-robot]

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