Update README.md

Author: ramalho

README.md

@@ -26,28 +26,28 @@ Part / Chapter #|Title|Directory|Notebook|1<sup>st</sup> ed. Chapter&nbsp;#
 2|An Array of Sequences|[02-array-seq](02-array-seq)|[array-seq.ipynb](02-array-seq/array-seq.ipynb)|2
 3|Dictionaries and Sets|[03-dict-set](03-dict-set)||3
 4|Text versus Bytes|[04-text-byte](04-text-byte)||4
-🆕 5|Record-like Data Structures|[05-record-like](05-record-like)||–
+5|Record-like Data Structures|[05-record-like](05-record-like)||🆕
 6|Object References, Mutability, and Recycling|[06-obj-ref](06-obj-ref)||8
 **III – Functions as Objects**|
 7|First-Class Funcions|[07-1class-func](07-1class-func)||5
-🆕 8|Type Hints in Function Definitions|[08-def-type-hints](08-def-type-hints)||–
+8|Type Hints in Function Definitions|[08-def-type-hints](08-def-type-hints)||🆕
 9|Function Decorators and Closures|[09-closure-deco](09-closure-deco)||7
 10|Design Patterns with First-Class Functions|[10-dp-1class-func](10-dp-1class-func)||6
 **IV – Object-Oriented Idioms**|
 11|A Pythonic Object|[11-pythonic-obj](11-pythonic-obj)||9
 12|Sequence Hacking, Hashing, and Slicing|[12-seq-hacking](12-seq-hacking)||10
 13|Interfaces, Protocols, and ABCs|[13-protocl-abc](13-protocol-abc)||11
 14|Inheritance: For Good or For Worse|[14-inheritance](14-inheritance)||12
-🆕 15|More About Type Hints|[15-type-hints](15-type-hints)||–
+15|More About Type Hints|15-type-hints||🆕
 16|Operator Overloading: Doing It Right|[16-op-overloading](16-op-overloading)||13
 **V – Control Flow**|
 17|Iterables, Iterators, and Generators|[17-it-generator](17-it-generator)||14
 18|Context Managers and else Blocks|[18-context-mngr](18-context-mngr)||15
 19|Classic Coroutines|[19-coroutine](19-coroutine)||16
-🆕 20|Concurrency Models in Python|[20-concurrency](20-concurrency)||-
+20|Concurrency Models in Python|[20-concurrency](20-concurrency)||🆕
 21|Concurrency with Futures|[21-futures](21-futures)||17
 22|Asynchronous Programming|[22-async](22-async)||18
 **VI – Metaprogramming**|
-23|Dynamic Attributes and Properties|[22-dyn-attr-prop](22-dyn-attr-prop)||19
-24|Attribute Descriptors|[23-descriptor](23-descriptor)||20
-25|Class Metaprogramming|[24-class-metaprog](24-class-metaprog)||21
+23|Dynamic Attributes and Properties|[23-dyn-attr-prop](23-dyn-attr-prop)||19
+24|Attribute Descriptors|[24-descriptor](24-descriptor)||20
+25|Class Metaprogramming|[25-class-metaprog](25-class-metaprog)||21