update Python DS

Author: rambasnet

notebooks/00-TableOfContents.ipynb

@@ -15,6 +15,8 @@
     "\n",
     "### [Python Objects](PythonObjects.ipynb)\n",
     "\n",
+    "### [Python Data Structures](PythonDataStructures.ipynb)\n",
+    "\n",
     "### [When to Use Object-Oriented Programming](WhenToUseOOP.ipynb)\n",
     "\n",
     "### [Expecting the Unexpected](ExpectingTheUnexpected.ipynb)\n",
@@ -27,8 +29,6 @@
     "\n",
     "### [Serialization, JSON & Rich CLI](SerializationAndJSON.ipynb)\n",
     "\n",
-    "### [Python Data Structures](PythonDataStructures.ipynb)\n",
-    "\n",
     "### [When Objects are Alike - Inheritance](WhenObjectsAreAlike.ipynb)\n",
     "\n",
     "### [Abstract Base Classes and Operator Overloading](ABCOperatorOverloading.ipynb)\n",