Whoops - spelling mistake in feature tag.

[markmandel]

This should fix things.

We should also do an error if feature shortcode
doesn't have either expiryVersion or publishVersion
https://gohugo.io/templates/shortcode-templates/#error-handling-in-shortcodes

[google-oss-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: markmandel, roberthbailey

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[agones-bot]

Build Succeeded 👏

Build Id: e39e6572-86c8-4c27-9a56-ab529169f668

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

• image: gcr.io/agones-images/agones-controller:1.2.0-5d5948b
• image: gcr.io/agones-images/agones-sdk:1.2.0-5d5948b
• image: gcr.io/agones-images/agones-ping:1.2.0-5d5948b
• Linux C++ SDK (build): agonessdk-1.2.0-5d5948b-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-1.2.0-5d5948b.zip

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

• https://5d5948b-dot-preview-dot-agones-images.appspot.com/

To install this version:

• git fetch https://github.com/GoogleCloudPlatform/agones.git pull/1204/head:pr_1204 && git checkout pr_1204
• helm install ./install/helm/agones --namespace agones-system --name agones --set agones.image.tag=1.2.0-5d5948b