Fix typo in the byte code documentation.
JerryScript-DCO-1.0-Signed-off-by: Daniel Vince
/**
* Several opcodes (mostly call and assignment opcodes) have
* two forms: one which does not push a return value onto
- * the stack, and another which does. The reasion is that
+ * the stack, and another which does. The reason is that
* the return value of these opcodes are often not used
* and the first form provides smaller byte code.
*
