fix bugs

tasks/merge.wdl

@@ -9,7 +9,7 @@ task merge {
 	String disk_size
 	
 	command <<<
-		bcftools concat -a ${snv_gzvcf_2} ${indel_gzvcf_2} > ${sample}.vcf
+		/opt/hall-lab/bcftools-1.9/bin/bcftools concat -a ${snv_gzvcf_2} ${indel_gzvcf_2} > ${sample}.vcf
 	>>>
 
 	runtime {