Correct Purtscheller's DOB

Author: olexandr-konovalov

episodes/23-continuous-integration-automated-testing.md

@@ -131,7 +131,7 @@ first_scaled_by:
   date_of_birth: 1858-03-22
   nationality: German
 - name: Ludwig Purtscheller
-  date_of_birth: 1858-03-22
+  date_of_birth: 1849-10-06
   nationality: Austrian
 ```