updated errata

Author: Sonawane-Karan26

errata.md

@@ -0,0 +1,19 @@
+# Errata, Corrections and Improvements
+----------------------------------------------------
+If you find any mistakes in the second edition of Python GUI Programming with Tkinter, or if you have suggestions for improvements, then please [raise an issue in this repository](https://github.com/PacktPublishing/Python-GUI-Programming-with-Tkinter-2E/issues), or email to us.
+
+## Chapter01, Page 8 - Adding the missing alias name `tk` in the code lines
+
+Incorrect code is:
+```
+root = Tk()
+
+label = Label(root, text="Hello World")
+```
+Correct code is:
+```
+root = tk.Tk()
+
+label = tk.Label(root, text="Hello World")
+```
+You can find this code correct in the file here: `Chapter01/hello_tkinter.py`