Fix typo in release notes

docs/release_notes/version_0.3_updates.rst

@@ -10,7 +10,7 @@ New features
 ++++++++++++++++
 - restructured and regenerated matrix inventory
 - allow using the ``method`` keyword in :func:`interpolate` to specify the interpolation method
-- allow using earthkit-data GRIB :xref:`fieldlist` in :func:`interpolate` as input data. This only works when  the output grid is regular latitude-longitude grid. This feature requires :xref:`earthkit-data` >= 0.6.0
+- allow using earthkit-data GRIB :xref:`fieldlist` in :func:`interpolate` as input data. This only works when  the output grid is regular a latitude-longitude grid. This feature requires :xref:`earthkit-data` >= 0.6.0
 - added notebook examples:
 
    - :ref:`/examples/healpix_fieldlist.ipynb`