Show phonopy .yml extension option in Abins(2D) algorithm docs

Author: ajjackson

docs/source/algorithms/Abins-v1.rst

@@ -23,7 +23,7 @@ scattering spectra (INS).
 
 Abins requires data from existing lattice dynamics calculations to determine the phonon mode frequencies and displacements. These are used to compute INS intensities; higher-order phonons may be approximated as combinations of fundamental modes.
 Several file formats are supported for frequency and displacement data at given :math:`\mathbf{q}`-points. Alternatively, force-constants data can be provided and a fine :math:`\mathbf{q}`-point mesh will be sampled automatically.
-Supported codes include CASTEP (.phonon), CRYSTAL (.out), DMOL3 (.outmol), GAUSSIAN (.log), PHONOPY (.yaml), VASP (.xml) as well as some pre-processed JSON (.json) formats. For more information about the files, features and quirks of these codes see :ref:`AbinsDataFormats`.
+Supported codes include CASTEP (.phonon), CRYSTAL (.out), DMOL3 (.outmol), GAUSSIAN (.log), PHONOPY (.yaml, .yml), VASP (.xml) as well as some pre-processed JSON (.json) formats. For more information about the files, features and quirks of these codes see :ref:`AbinsDataFormats`.
 
 The user may also provide an experimental file with measured dynamical structure factor S in order to directly
 compare theoretical and experimental spectra.

docs/source/algorithms/Abins2D-v1.rst

@@ -26,7 +26,7 @@ Abins requires data from existing lattice dynamics calculations to determine the
 
 Several file formats are supported for frequency and displacement data at given :math:`\mathbf{q}`-points. Alternatively, force-constants data can be provided and a fine :math:`\mathbf{q}`-point mesh will be sampled automatically.
 
-Supported codes include CASTEP (.phonon), CRYSTAL (.out), DMOL3 (.outmol), GAUSSIAN (.log), PHONOPY (.yaml), VASP (.xml) as well as some pre-processed JSON (.json) formats. For more information about the files, features and quirks of theskee codes see :ref:`AbinsDataFormats`.
+Supported codes include CASTEP (.phonon), CRYSTAL (.out), DMOL3 (.outmol), GAUSSIAN (.log), PHONOPY (.yaml, .yml), VASP (.xml) as well as some pre-processed JSON (.json) formats. For more information about the files, features and quirks of theskee codes see :ref:`AbinsDataFormats`.
 
 For VASP XML inputs, it is also permitted to use a "selective dynamics" in which some atoms are frozen.
 In this case, data is only available for the moving atoms and contributions from the other atoms are omitted from the calculated spectrum.