Correct docs for sediment parameters

docs/users/parameters/sediment-parameters.csv

@@ -1,5 +1,5 @@
 {bdg-dark-line}`group` Name(dimensions),Specified in,Data type,Required or optional,Model units,Description
-{bdg-dark-line}`sediment` `porosity`,{bdg-secondary}`constants.nml` {bdg-danger}`constants.yaml` ,float,Required,\-,Average sediment porosity
+{bdg-dark-line}`sediment` `porosity(sed_l)`,{bdg-secondary}`constants.nml` {bdg-danger}`constants.yaml` ,float,Required,\-,Average sediment porosity
 {bdg-dark-line}`sediment` `initial_mass(spm)`,{bdg-secondary}`constants.nml` {bdg-danger}`constants.yaml` ,float,Required,kg/m<sup>2</sup>,The mass of each sediment size class at the start of the model run.
 {bdg-dark-line}`sediment` `fractional_composition_distribution(fc)`,{bdg-secondary}`constants.nml` {bdg-danger}`constants.yaml` ,float,Required,\-,"The default distribution of sediment mass across fractional compositions, as a percentage."
 {bdg-dark-line}`sediment` `default_spm_size_distribution(spm)`,{bdg-secondary}`constants.nml` {bdg-danger}`constants.yaml` ,float,Required,\-,"The default size distribution applied to sediment particles, as a percentage, when there is no other information, such as from soil erosion yields."