Fix bug where mutation and recombination rates input to _tskit.LsHmm are flipped

Author: szhan

python/tests/beagle_numba.py

@@ -410,8 +410,8 @@ def run_tsimpute(ref_ts, query_h, pos, mu, rho, precision=22, genetic_map=None):
     bm = _tskit.CompressedMatrix(ref_ts_genotyped._ll_tree_sequence)
     ls_hmm = _tskit.LsHmm(
         ref_ts_genotyped._ll_tree_sequence,
-        mu,
         rho,
+        mu,
         acgt_alleles=True,
         precision=precision,
     )