Remove trailing whitespace.

[roberthbailey]

This allows the command can be copy/pasted.

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:
In the past two days I've copied this command a few times and gotten the error unrecognized arguments: followed by command not found: --enable-image-streaming. It took me a few minutes to realize it's because there is an extra space, which means the backslash isn't escaping the newline which turns this into two commands (neither of which works).

Which issue(s) this PR fixes:

Closes #

Special notes for your reviewer:

[agones-bot]

Build Succeeded 👏

Build Id: e6b45549-83b0-4852-aeac-a02070d38fb5

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:1.28.0-d555796-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-sdk:1.28.0-d555796-linux-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-ping:1.28.0-d555796-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-allocator:1.28.0-d555796-amd64
• Linux C++ SDK (build): agonessdk-1.28.0-d555796-amd64-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-1.28.0-d555796-amd64.zip

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

• https://d555796-dot-preview-dot-agones-images.appspot.com/

To install this version:

• git fetch https://github.com/googleforgames/agones.git pull/2839/head:pr_2839 && git checkout pr_2839
• helm install agones ./install/helm/agones --namespace agones-system --set agones.image.tag=1.28.0-d555796-amd64

[gongmax]

Maybe we can add some Markdown linter so this kind of issue can be captured automatically in future.

[google-oss-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: gongmax, roberthbailey, zmerlynn

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

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [roberthbailey]

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

[google-oss-prow]

New changes are detected. LGTM label has been removed.

[agones-bot]

Build Failed 😱

Build Id: e207b1b8-49f7-4503-acd5-3240cb40c32f

• Cloud Build view
• Cloud Build log download

To get permission to view the Cloud Build view, join the agones-discuss Google Group.

[agones-bot]

Build Failed 😱

Build Id: 9e42e7c3-b8a5-436e-aa64-6f4f35d89765

• Cloud Build view
• Cloud Build log download

To get permission to view the Cloud Build view, join the agones-discuss Google Group.

[agones-bot]

Build Succeeded 👏

Build Id: eb52813e-8cd3-435e-915b-ca515fbe3af9

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:1.28.0-eb04525-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-sdk:1.28.0-eb04525-linux-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-ping:1.28.0-eb04525-amd64
• image: us-docker.pkg.dev/agones-images/ci/agones-allocator:1.28.0-eb04525-amd64
• Linux C++ SDK (build): agonessdk-1.28.0-eb04525-amd64-linux-arch_64.tar.gz
• SDK Server: agonessdk-server-1.28.0-eb04525-amd64.zip

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

• https://eb04525-dot-preview-dot-agones-images.appspot.com/

To install this version:

• git fetch https://github.com/googleforgames/agones.git pull/2839/head:pr_2839 && git checkout pr_2839
• helm install agones ./install/helm/agones --namespace agones-system --set agones.image.tag=1.28.0-eb04525-amd64