fix typo introduced in Akuli#23

Akuli · Akuli · commit 7b1c8f01007e · 2020-10-04T16:29:58.000+03:00
diff --git a/README.md b/README.md
@@ -1,4 +1,4 @@
-# Python programming tutorial for begineers
+# Python programming tutorial for beginners
 
 This is a concise Python 3 programming tutorial for people who think
 that reading is boring. I try to show everything with simple code
