Update README.md

Author: gvenzl

sql/README.md

@@ -1,5 +1,5 @@
 # SQL based examples
-This folder stores SQL (Structured Query Lanugage) based examples for Oracle Database.
+This folder stores SQL (Structured Query Language) based examples for Oracle Database.
 
 ## dw-vldb-samples
 Legacy repository of Data Warehousing SQL based examples.