chore: correct typo

Author: DanielRivers

src/content/docs/properties/work-with-properties/marketing-tags-properties.mdx

@@ -78,7 +78,7 @@ For example in the React SDK:
   properties={{
     utm_source: "my source",
     utm_medium: "some medium",
-    utm_campaign: "awesome campaing",
+    utm_campaign: "awesome campaign",
     utm_content: "something else",
     utm_term: "my terms",
     click_id: "1234"