fix inputs bug

defaults

@@ -13,11 +13,11 @@
     "bcftools_docker": "registry.cn-shanghai.aliyuncs.com/pgx-docker-registry/bcftools:v1.9",
     "database": "oss://pgx-reference-data/annovar/",
     "regions": "oss://pgx-reference-data/reference/wes_bedfiles/agilent_v6/agilent_v6_cosmic_hg38.bed",
-    "set_pon": true,
+    "set_pon": "true",
     "cosmic_vcf": "CosmicCodingMuts.hg38.v91.vcf",
     "cosmic_dir": "oss://pgx-reference-data/reference/cosmic/",
     "disk_size": "200",
     "cluster_config": "OnDemand bcs.a2.3xlarge img-ubuntu-vpc",
-    "set_annovar": true,
-    "set_vcf2maf": true
+    "set_annovar": "true",
+    "set_vcf2maf": "true"
 }