Typo correction

Signed-off-by: Janos Varga <113785741+vargajb@users.noreply.github.com>

Author: vargajb

COBOL Programming Course #3 - Advanced Topics/Challenges/Debugging/cbl/CBL0106C.cbl

@@ -168,7 +168,7 @@
       * file changes again. A handled error is easier to find and fix 
       * than a buffer overwrite error.
                IF SUB1 > OVERLIMIT-MAX THEN
-                   DISPLAY 'OVERFOLW TABLE OVERLIMIT'
+                   DISPLAY 'OVERFLOW TABLE OVERLIMIT'
                    MOVE 1000 TO RETURN-CODE
                    STOP RUN
                END-IF