fix: bcftools norm

tasks/bcftools.wdl

@@ -13,7 +13,9 @@ task bcftools {
     set -e
     nt=$(nproc)
     
-    bcftools norm -m -both ${vcf} | bcftools norm -f ${ref_dir}/${fasta} -Ov -o ${basename}.norm.vcf
+    # bcftools norm -m -both ${vcf} | bcftools norm -f ${ref_dir}/${fasta} -Ov -o ${basename}.norm.vcf
+    # Split multiallelic sites
+    bcftools norm -m -both ${vcf} -o ${basename}.norm.vcf
   >>>
   
   runtime {