Clarify that this is for Campaign **Standard**

[tyssejc]

It needs to be abundantly clear to people seeking assistance with Campaign that there's a pretty stark distinction between Campaign Classic and Campaign Standard.

[tyssejc]

@shazron @gvol @yuhui @krculp sorry to spam you, I didn't know who to assign this to — this is my first Adobe docs PR, please be gentle 🙏

[MicaPete]

These changes were copied to the internal repo and published:

https://experienceleague.adobe.com/docs/analytics/integration/adobe-campaign.html?lang=en