Fix typo in workerqueue

[markmandel]

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespace from that line:

/kind breaking
/kind bug

/kind cleanup

/kind documentation
/kind feature
/kind hotfix

What this PR does / Why we need it:
Fixes a typo in a comment

[agones-bot]

Build Succeeded 👏

Build Id: a60ed4a1-b0cf-4b01-94e7-fd379e2d9ccd

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

• image: gcr.io/agones-images/agones-controller:1.6.0-fe97588
• image: gcr.io/agones-images/agones-sdk:1.6.0-fe97588
• image: gcr.io/agones-images/agones-ping:1.6.0-fe97588
• Linux C++ SDK (build): agonessdk-1.6.0-fe97588-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-1.6.0-fe97588.zip

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

• https://fe97588-dot-preview-dot-agones-images.appspot.com/

To install this version:

• git fetch https://github.com/GoogleCloudPlatform/agones.git pull/1525/head:pr_1525 && git checkout pr_1525
• helm install ./install/helm/agones --namespace agones-system --name agones --set agones.image.tag=1.6.0-fe97588

[google-oss-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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

The full list of commands accepted by this bot can be found here.

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• OWNERS [EricFortin,markmandel]

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Approvers can cancel approval by writing /approve cancel in a comment

[google-oss-robot]

New changes are detected. LGTM label has been removed.

[agones-bot]

Build Succeeded 👏

Build Id: ee70f786-8ec1-4a9b-84f1-36c78598d40b

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

• image: gcr.io/agones-images/agones-controller:1.6.0-e1e552d
• image: gcr.io/agones-images/agones-sdk:1.6.0-e1e552d
• image: gcr.io/agones-images/agones-ping:1.6.0-e1e552d
• Linux C++ SDK (build): agonessdk-1.6.0-e1e552d-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-1.6.0-e1e552d.zip

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

• https://e1e552d-dot-preview-dot-agones-images.appspot.com/

To install this version:

• git fetch https://github.com/GoogleCloudPlatform/agones.git pull/1525/head:pr_1525 && git checkout pr_1525
• helm install ./install/helm/agones --namespace agones-system --name agones --set agones.image.tag=1.6.0-e1e552d