Update README.md

Author: anzawi

README.md

@@ -661,7 +661,7 @@ $db->table('users')->alterSchema(['drop', 'full_name'])->alter();
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 # Change Log
 ### 3.1.0
-* FIX : Dublocate connection
+* FIX : Duplicate connection
 * ADD : Some methods
     * each() -> to each all collection values
     * map()  -> to map all results