Typo fix docs number notation

[mgenser]

Hi!

I just stumbled across this project and scrolled through your documentation. Great project!

In the convert number section of the number notation page are the following examples:

0xffee to bin
42 ot oct
2^16 - 1 to hex

I started a repl to try out this example: 42 ot oct
Which resulted in this error:

42 ot oct
error: while type checking
┌─ input:3:1:4
│
1 │ 42 ot oct
│ ^^ unknown identifier

The same example with the typo fixed works fine:

42 to oct

oct(42)

= 0o52    [String]

[sharkdp]

Thank you!