Python: Fix typo (decent => descent)

Author: RasmusWL

python/ql/src/semmle/python/dataflow/Implementation.qll

@@ -717,13 +717,13 @@ private class EssaTaintTracking extends string {
             path.noAttribute()
         |
             assign.getValue().getAFlowNode() = srcnode.asCfgNode() and
-            kind = iterable_unpacking_decent(assign.getATarget().getAFlowNode(), defn.getDefiningNode(),
+            kind = iterable_unpacking_descent(assign.getATarget().getAFlowNode(), defn.getDefiningNode(),
                     srckind)
         )
     }
 
     /** `((x,y), ...) = value` with any nesting on LHS */
-    private TaintKind iterable_unpacking_decent(
+    private TaintKind iterable_unpacking_descent(
         SequenceNode left_parent, ControlFlowNode left_defn, CollectionKind parent_kind
     ) {
         left_parent.getAnElement() = left_defn and
@@ -732,7 +732,7 @@ private class EssaTaintTracking extends string {
         then result = parent_kind
         else result = parent_kind.getMember()
         or
-        result = iterable_unpacking_decent(left_parent.getAnElement(), left_defn,
+        result = iterable_unpacking_descent(left_parent.getAnElement(), left_defn,
                 parent_kind.getMember())
     }