Quick Start 'Run it' output doesn't match the example code

[runyaga]

Context

Minor README inconsistency that may confuse newbies checking their setup.

README shows

Code:

final result = await monty.run('2 + 2');
print(result.value); // 4

Then under "Run it":

$ dart run
Result: 4

Actual output

$ dart run
4

The code does `print(result.value)` which prints `4`, not `Result: 4`. The example/example.dart does `print('Result: ${result.value}')` which would print `Result: 4`, but that's not what the Quick Start code block shows.

Impact

• Newbie: "It printed 4, but the README says it should print Result: 4. Did I do something wrong?"
• Low severity but suggests the README wasn't tested end-to-end

Suggested fix

Change the "Run it" output to match the code:

$ dart run
4