Document undocumented props within MetaSection README (#2200)

Add undocumented props `inlineLayout`, `noBackGround`, and `useAccordion` to the `<MetaSection>` README.

Co-authored-by: John Coburn <[email protected]>

lib/MetaSection/readme.md

@@ -21,6 +21,9 @@ createdDate | string | Date/time a record was created. |  |
 headingLevel | number | Sets the heading level of the heading inside the accordion header. | 4 |
 hideSource | boolean | Allows for the concealment of the createdBy and updatedBy information on the display
 id | string | HTML id attribute assigned to accordion's root. |  |
+inlineLayout | boolean | If it should display inline (`display: flex`) | false |
 lastUpdatedBy | string/object | Name/record of the last user who modified the record. |  |
 lastUpdatedDate | string | Latest date/time a record was modified. |  |
+noBackGround | boolean | If the background color should be disabled | false |
 showUserLink | boolean | Should the user name link to the user record? Pass in permission | false |
+useAccordion | boolean | If the component should render within an `<Accordion>` | true |