Update configuring-autoscaling.md

[ianpartridge]

The description says:

You can view the default contents of this ConfigMap using the following command.

To view the contents of the ConfigMap you actually want to describe the resource, not get.

[knative-prow-robot]

Hi @ianpartridge. Thanks for your PR.

I'm waiting for a knative member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[samodell]

/ok-to-test
/lgtm
/approval

[samodell]

/approve

[knative-prow-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ianpartridge, samodell

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