Updated to fix class name, add PolicySource parameter

[mtniehaus]

Based on what I ran into implementing an alternate content provider.

[mtniehaus]

@microsoft-github-policy-service agree [company="Tanium"]

[mtniehaus]

@microsoft-github-policy-service agree company="Tanium"

[prmerger-automator[bot]]

@mtniehaus : Thanks for your contribution! The author(s) have been notified to review your proposed change.

[prmerger-automator[bot]]

@mtniehaus : Thanks for your contribution! The author(s) and reviewer(s) have been notified to review your proposed change.

[MandiOhlinger]

@mtniehaus Hi - This PR has a merge conflict. If it's still needed, can you create a new pull request? We want to make sure you get credit for the doc change.