Fix AWS EKS cluster creating docs

[aLekSer]

All comments regarding CNI is outdated, resulting cluster would have
version of CNI 1.5 which is bigger than 1.2 required.

Part of #717.

[googlebot]

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[aLekSer]

Well I have not configured valid email for git on new device

[googlebot]

CLAs look good, thanks!

ℹ️ Googlers: Go here for more info.

[roberthbailey]

Please use the {{% feature expiryVersion="0.12.0" %}} and {{% feature publishVersion="0.12.0" %}} blocks to wrap the changes so that they go live with the 0.12.0 release instead of immediately.

See https://agones.dev/site/docs/contribute/

[agones-bot]

Build Succeeded 👏

Build Id: 33e3945e-46e2-4aba-9966-830de8526733

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

• image: gcr.io/agones-images/agones-controller:0.12.0-91ac798
• image: gcr.io/agones-images/agones-sdk:0.12.0-91ac798
• image: gcr.io/agones-images/agones-ping:0.12.0-91ac798
• Linux C++ SDK (build): agonessdk-0.12.0-91ac798-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-0.12.0-91ac798.zip

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

• https://91ac798-dot-preview-dot-agones-images.appspot.com/

To install this version:

• git fetch https://github.com/GoogleCloudPlatform/agones.git pull/965/head:pr_965 && git checkout pr_965
• helm install install/helm/agones --namespace agones-system --name agones --set agones.image.tag=0.12.0-91ac798

[agones-bot]

Build Succeeded 👏

Build Id: 57ffeec7-d948-4dd4-aa4b-4103ece42d3a

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

• image: gcr.io/agones-images/agones-controller:0.12.0-ab3925c
• image: gcr.io/agones-images/agones-sdk:0.12.0-ab3925c
• image: gcr.io/agones-images/agones-ping:0.12.0-ab3925c
• Linux C++ SDK (build): agonessdk-0.12.0-ab3925c-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-0.12.0-ab3925c.zip

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

• https://ab3925c-dot-preview-dot-agones-images.appspot.com/

To install this version:

• git fetch https://github.com/GoogleCloudPlatform/agones.git pull/965/head:pr_965 && git checkout pr_965
• helm install install/helm/agones --namespace agones-system --name agones --set agones.image.tag=0.12.0-ab3925c

[agones-bot]

Build Succeeded 👏

Build Id: b80c0d29-c63a-45e1-b65a-0fd7bbab42d2

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

• image: gcr.io/agones-images/agones-controller:0.12.0-56e5539
• image: gcr.io/agones-images/agones-sdk:0.12.0-56e5539
• image: gcr.io/agones-images/agones-ping:0.12.0-56e5539
• Linux C++ SDK (build): agonessdk-0.12.0-56e5539-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-0.12.0-56e5539.zip

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

• https://56e5539-dot-preview-dot-agones-images.appspot.com/

To install this version:

• git fetch https://github.com/GoogleCloudPlatform/agones.git pull/965/head:pr_965 && git checkout pr_965
• helm install install/helm/agones --namespace agones-system --name agones --set agones.image.tag=0.12.0-56e5539

[agones-bot]

Build Succeeded 👏

Build Id: a76d0031-a610-450f-ae84-611541e079b0

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

• image: gcr.io/agones-images/agones-controller:0.12.0-a014640
• image: gcr.io/agones-images/agones-sdk:0.12.0-a014640
• image: gcr.io/agones-images/agones-ping:0.12.0-a014640
• Linux C++ SDK (build): agonessdk-0.12.0-a014640-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-0.12.0-a014640.zip

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

• https://a014640-dot-preview-dot-agones-images.appspot.com/

To install this version:

• git fetch https://github.com/GoogleCloudPlatform/agones.git pull/965/head:pr_965 && git checkout pr_965
• helm install install/helm/agones --namespace agones-system --name agones --set agones.image.tag=0.12.0-a014640

[agones-bot]

Build Succeeded 👏

Build Id: fc719ae4-504d-444d-bc7d-76198ba79dc6

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

• image: gcr.io/agones-images/agones-controller:0.12.0-4e71374
• image: gcr.io/agones-images/agones-sdk:0.12.0-4e71374
• image: gcr.io/agones-images/agones-ping:0.12.0-4e71374
• Linux C++ SDK (build): agonessdk-0.12.0-4e71374-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-0.12.0-4e71374.zip

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

• https://4e71374-dot-preview-dot-agones-images.appspot.com/

To install this version:

• git fetch https://github.com/GoogleCloudPlatform/agones.git pull/965/head:pr_965 && git checkout pr_965
• helm install install/helm/agones --namespace agones-system --name agones --set agones.image.tag=0.12.0-4e71374