Update requirements.txt

This notebook is failing to display astropy tables with the `table.show_in_notebook()` method because there is no module `ipydatagrid` found.  After adding `ipydatagrid` to the environment, the tables display correctly, and the notebook fully executes.

notebooks/DrizzlePac/sky_matching/requirements.txt

@@ -1,6 +1,7 @@
 astropy>=5.3.3
 astroquery>=0.4.6
 drizzlepac>=3.5.1
+ipydatagrid>=1.4.0
 ipython>=8.11.0
 matplotlib>=3.7.0
 pandas>=1.5.3