Fix EdgeQL's Numebr floor div syntax
There is a small typo making arithmetic of the Numbers a bit harder to understand. The floordiv is written as a singular `/` rather than the correct `//`.
@@ -252,7 +252,7 @@ numerical data.
:eql:op:`\<= <lteq>` :eql:op:`\>= <gteq>`
* - Arithmetic
- :eql:op:`+ <plus>` :eql:op:`- <minus>` :eql:op:`- <uminus>`
- :eql:op:`* <mult>` :eql:op:`/ <div>` :eql:op:`/ <floordiv>`
+ :eql:op:`* <mult>` :eql:op:`/ <div>` :eql:op:`// <floordiv>`
:eql:op:`% <mod>` :eql:op:`^ <pow>`
* - Statistics
- :eql:func:`sum` :eql:func:`min` :eql:func:`max` :eql:func:`math::mean`
