docs(ObjectPage): outline when to use subsections (#6899)

Closes #6644

Author: Lukas742

packages/main/src/components/ObjectPageSection/index.tsx

@@ -17,6 +17,8 @@ export interface ObjectPageSectionPropTypes extends CommonProps {
   id: string;
   /**
    * Defines the content of the `ObjectPageSection`.
+   *
+   * __Note:__ Only use subsections if more than one is available. Otherwise, add the content of the section directly as `child`.
    */
   children: ReactNode | ReactNode[];
   /**

packages/main/src/components/ObjectPageSubSection/index.tsx

@@ -51,8 +51,11 @@ export interface ObjectPageSubSectionPropTypes extends CommonProps {
 }
 
 /**
- * Second-level information container of an `ObjectPage`.<br />
+ * Second-level information container of an `ObjectPage`.
+ *
  * __Note:__ This component should only be used inside an `ObjectPageSection` component.
+ *
+ * __Note:__ Only use subsections if more than one is available. Otherwise, add the content of the section directly as `child` of the `ObjectPageSection`.
  */
 const ObjectPageSubSection = forwardRef<HTMLDivElement, ObjectPageSubSectionPropTypes>((props, ref) => {
   const {