Clean bad links from AlmaClass.query_sia docstring

The docstring of `astroquery.alma.AlmaClass.query_sia()` is constructed
with the help of `pyvo.dal.sia2.SIA_PARAMETERS_DESC` constant, which
however contains links that Sphinx is unable to resolve. These links are
removed by this commit so that the documentation build can succeed.

Author: eerovaher

astroquery/alma/core.py

@@ -426,6 +426,10 @@ def query_sia(self, pos=None, band=None, time=None, pol=None,
             maxrec=maxrec,
             **kwargs)
 
+    # SIA_PARAMETERS_DESC contains links that Sphinx can't resolve.
+    for var in ('POLARIZATION_STATES', 'CALIBRATION_LEVELS'):
+        SIA_PARAMETERS_DESC = SIA_PARAMETERS_DESC.replace(f'`pyvo.dam.obscore.{var}`',
+                                                          f'pyvo.dam.obscore.{var}')
     query_sia.__doc__ = query_sia.__doc__.replace('_SIA2_PARAMETERS', SIA_PARAMETERS_DESC)
 
     def query_tap(self, query, maxrec=None):