Quilkin added in third-party-content/examples

[Kalaiselvi84]

What type of PR is this?

Uncomment only one /kind <> line, press 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:

Which issue(s) this PR fixes:

Closes #2226

Special notes for your reviewer:

[agones-bot]

Build Succeeded 👏

Build Id: b424c246-c90c-48dc-99e2-98fb0e53f914

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

• image: us-docker.pkg.dev/agones-images/ci/agones-controller:1.32.0-3369fbd-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-sdk:1.32.0-3369fbd-linux-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-ping:1.32.0-3369fbd-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-allocator:1.32.0-3369fbd-amd64
• Linux C++ SDK (build): agonessdk-1.32.0-3369fbd-amd64-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-1.32.0-3369fbd-amd64.zip

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

• https://3369fbd-dot-preview-dot-agones-images.appspot.com/

To install this version:

• git fetch https://github.com/googleforgames/agones.git pull/3129/head:pr_3129 && git checkout pr_3129
• helm install agones ./install/helm/agones --namespace agones-system --agones.image.release=us-docker.pkg.dev/agones-images/ci --set agones.image.tag=1.32.0-3369fbd-amd64

[markmandel]

Tweaking some links, since there are a few options to link to - but otherwise, looks good 👍🏻

Suggested change

* [Quilkin with Agones](https://github.com/googleforgames/quilkin/tree/main/examples) is an example of running [Xonotic with Quilkin](https://github.com/googleforgames/quilkin/tree/main/examples/agones-xonotic-sidecar) on an Agones cluster, utilising the sidecar integration pattern and Quilkin xDS Agones provider with a TokenRouter to provide routing and access control to the allocated GameServer instance.

* [Quilkin with Agones](https://github.com/googleforgames/quilkin/tree/main/examples) is an example of running [Xonotic](https://xonotic.org/) with Quilkin on an Agones cluster, utilising either [the sidecar integration pattern](https://github.com/googleforgames/quilkin/tree/main/examples/agones-xonotic-sidecar) or via the the [Quilkin xDS Agones provider](https://github.com/googleforgames/quilkin/tree/main/examples/agones-xonotic-xds) with a TokenRouter to provide routing and access control to the allocated GameServer instance.

[Kalaiselvi84]

I have modified this line

[agones-bot]

Build Failed 😱

Build Id: 78906d54-db7b-4f4c-a9a2-8f09f9d1fc46

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[agones-bot]

Build Failed 😱

Build Id: 8cf7df24-19da-45e2-83f3-179d3fa33a7d

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[agones-bot]

Build Succeeded 👏

Build Id: 5ad1f319-3712-4197-9321-ae8f32e61db7

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

• image: us-docker.pkg.dev/agones-images/ci/agones-controller:1.32.0-8135b49-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-sdk:1.32.0-8135b49-linux-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-ping:1.32.0-8135b49-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-allocator:1.32.0-8135b49-amd64
• Linux C++ SDK (build): agonessdk-1.32.0-8135b49-amd64-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-1.32.0-8135b49-amd64.zip

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

• https://8135b49-dot-preview-dot-agones-images.appspot.com/

To install this version:

• git fetch https://github.com/googleforgames/agones.git pull/3129/head:pr_3129 && git checkout pr_3129
• helm install agones ./install/helm/agones --namespace agones-system --agones.image.release=us-docker.pkg.dev/agones-images/ci --set agones.image.tag=1.32.0-8135b49-amd64

[google-oss-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Kalaiselvi84, markmandel

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