Apply suggestions from code review

Co-authored-by: Rasmus Wriedt Larsen <rasmuswriedtlarsen@gmail.com>

Author: yoff

python/ql/lib/change-notes/2023-06-13-container-store-steps.md

@@ -1,4 +1,4 @@
 ---
 category: minorAnalysis
 ---
-* More precise modelling of several container functions and methods.
+* More precise modelling of several container functions (such as `sorted`, `reversed`) and methods (such as `set.add`, `list.append`).

python/ql/lib/semmle/python/frameworks/Stdlib.qll

@@ -4349,7 +4349,7 @@ private module StdlibPrivate {
       output = "Argument[self].ListElement" and
       preservesValue = true
       or
-      // transfer taint from new element to this
+      // transfer taint from new element to this (TODO: remove in future when taint-handling is more in line with other languages)
       input = "Argument[0]" and
       output = "Argument[self]" and
       preservesValue = false
@@ -4391,7 +4391,7 @@ private module StdlibPrivate {
       output = "Argument[self].SetElement" and
       preservesValue = true
       or
-      // transfer taint from new element to this
+      // transfer taint from new element to this (TODO: remove in future when taint-handling is more in line with other languages)
       input = "Argument[0]" and
       output = "Argument[self]" and
       preservesValue = false