Fix typo in GetProfileDS query used to generate cache.config

[rob05c]

Fix typo from merge conflict

What does this PR (Pull Request) do?

Fix typo from merge conflict

No documentation, no interface change.
Endpoint already has tests, they caught this.

• This PR fixes #REPLACE_ME OR is not related to any Issue

Which Traffic Control components are affected by this PR?

• Traffic Ops

What is the best way to verify this PR?

curl ats config endpoints.

If this is a bug fix, what versions of Traffic Control are affected?

no versions

The following criteria are ALL met by this PR

• This PR includes tests OR I have explained why tests are unnecessary
• This PR includes documentation OR I have explained why documentation is unnecessary
• This PR includes an update to CHANGELOG.md OR such an update is not necessary
• This PR includes any and all required license headers
• This PR ensures that database migration sequence is correct OR this PR does not include a database migration
• This PR DOES NOT FIX A SERIOUS SECURITY VULNERABILITY (see the Apache Software Foundation's security guidelines for details)

[mhoppa]

Great find!! Are there API tests in place that would have caught this issue?

[rob05c]

@mhoppa I thought it did cause the API tests to fail, but I was mistaken. I added tests: #3941

They only test the 200, which catches this issue. They don't extensively test that the config is correct; but, we're moving to cache-side generation and these endpoints won't be used anymore, so it isn't worth adding lots of logic tests. The right place for more of those is the lib/go-atscfg unit tests.