don't reference internal attribute

Author: MichaelChirico

NEWS.md

@@ -198,7 +198,7 @@ rowwiseDT(
 
 20. Fixed a memory issue causing segfaults in `forder`, [#6797](https://github.com/Rdatatable/data.table/issues/6797). Thanks @dkutner for the report and @MichaelChirico for the fix.
 
-21. `setDT(get0('var'))` now correctly modifies `var` by reference, consistent with the long-standing behavior of `setDT(get('var'))`. Previously, the `.internal.selfref` attribute was not set, [#6864](https://github.com/Rdatatable/data.table/issues/6864). Thanks to @rikivillalba for the report and @venom1204 for the fix.
+21. `setDT(get0('var'))` now correctly modifies `var` by reference, consistent with the long-standing behavior of `setDT(get('var'))`, [#6864](https://github.com/Rdatatable/data.table/issues/6864). Thanks to @rikivillalba for the report and @venom1204 for the fix.
 
 ### NOTES