update parameter_meta

bwa.wdl

@@ -142,7 +142,9 @@ task Kit {
         readgroup: {description: "A readgroup identifier.", category: "common"}
         sixtyFour: {description: "Whether or not the index uses the '.64' suffixes.", category: "common"}
         threads: {description: "The number of threads to use for alignment.", category: "advanced"}
-        sortThreads: {description: "The number of threads to use for sorting.", category: "advanced"}
+        sortThreads: {description: "The number of additional threads to use for sorting.", category: "advanced"}
+        sortMemoryPerThread: {description: "The amount of memory for each sorting thread.", category: "advanced"}
+        compressionLevel: {description: "The compression level of the output BAM", category: "advanced"}
         memory: {description: "The amount of memory this job will use.", category: "advanced"}
         dockerImage: {description: "The docker image used for this task. Changing this may result in errors which the developers may choose not to address.",
                       category: "advanced"}