Swift: Improve QLDoc.

Author: geoffw0

swift/ql/lib/codeql/swift/security/InsufficientHashIterationsQuery.qll

@@ -21,7 +21,7 @@ private class IntLiteralSource extends IterationsSource instanceof IntegerLitera
 }
 
 /**
- * A dataflow configuration from the hash iterations source to expressions that use
+ * A taint tracking configuration from the hash iterations source to expressions that use
  * it to initialize hash functions.
  */
 module InsufficientHashIterationsConfig implements DataFlow::ConfigSig {

swift/ql/lib/codeql/swift/security/WeakSensitiveDataHashingQuery.qll

@@ -9,6 +9,10 @@ import codeql.swift.dataflow.DataFlow
 import codeql.swift.dataflow.TaintTracking
 import codeql.swift.security.WeakSensitiveDataHashingExtensions
 
+/**
+ * A taint tracking configuration from sensitive expressions to broken or weak
+ * hashing sinks.
+ */
 module WeakHashingConfig implements DataFlow::ConfigSig {
   predicate isSource(DataFlow::Node node) { node.asExpr() instanceof SensitiveExpr }