Update the go version upgrade template

[gongmax]

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
/kind release

What this PR does / Why we need it:
Update the go version upgrade template to reflect the actual steps we took.

Which issue(s) this PR fixes:

Closes #

Special notes for your reviewer:

[agones-bot]

Build Succeeded 🥳

Build Id: e52e45d4-d611-4395-975f-2ae85ead3c0b

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:1.44.0-dev-d59dff1
• image: us-docker.pkg.dev/agones-images/ci/agones-extensions:1.44.0-dev-d59dff1
• image: us-docker.pkg.dev/agones-images/ci/agones-sdk:1.44.0-dev-d59dff1-linux
• image: us-docker.pkg.dev/agones-images/ci/agones-ping:1.44.0-dev-d59dff1
• image: us-docker.pkg.dev/agones-images/ci/agones-allocator:1.44.0-dev-d59dff1
• Linux C++ SDK (build): agonessdk-1.44.0-dev-d59dff1-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-1.44.0-dev-d59dff1.zip

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

• https://d59dff1-dot-preview-dot-agones-images.appspot.com/

To install this version:

git fetch https://github.com/googleforgames/agones.git pull/4011/head:pr_4011 && git checkout pr_4011
helm install agones ./install/helm/agones --namespace agones-system --set agones.image.registry=us-docker.pkg.dev/agones-images/ci --set agones.image.tag=1.44.0-dev-d59dff1

[0xaravindh]

LGTM

[agones-bot]

Build Succeeded 🥳

Build Id: 5825d25e-470c-446c-9719-ad0112686e09

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:1.44.0-dev-e8db326
• image: us-docker.pkg.dev/agones-images/ci/agones-extensions:1.44.0-dev-e8db326
• image: us-docker.pkg.dev/agones-images/ci/agones-sdk:1.44.0-dev-e8db326-linux
• image: us-docker.pkg.dev/agones-images/ci/agones-ping:1.44.0-dev-e8db326
• image: us-docker.pkg.dev/agones-images/ci/agones-allocator:1.44.0-dev-e8db326
• Linux C++ SDK (build): agonessdk-1.44.0-dev-e8db326-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-1.44.0-dev-e8db326.zip

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

• https://e8db326-dot-preview-dot-agones-images.appspot.com/

To install this version:

git fetch https://github.com/googleforgames/agones.git pull/4011/head:pr_4011 && git checkout pr_4011
helm install agones ./install/helm/agones --namespace agones-system --set agones.image.registry=us-docker.pkg.dev/agones-images/ci --set agones.image.tag=1.44.0-dev-e8db326