Fix spelling

Author: tshemsedinov

content/Index.en.md

@@ -72,7 +72,7 @@
     10.2. Event-driven and reactive programming  
     10.3. Automata-based programming and state machines  
     10.4. Language-oriented programming and DSLs  
-    10.5. Data-flow pogramming  
+    10.5. Data-flow programming  
     10.6. Metaprogramming  
     10.7. Metamodel dynamic interpretation
 11. Databases and persistent storage

content/Links.en.md

@@ -2,7 +2,7 @@
 
 - Author: https://github.com/tshemsedinov
 - Telegram: https://t.me/HowProgrammingWorks
-- Excercises:
+- Exercises:
   https://github.com/HowProgrammingWorks/Index/blob/master/Exercises.ru.md
 - Glossary:
   https://github.com/HowProgrammingWorks/Dictionary/blob/master/Fundamentals.ru.md