Correct typo in p0144 Numeric literal semantics (#4478)

This was already corrected in the design at

https://github.com/carbon-language/carbon-lang/blob/trunk/docs/design/expressions/literals.md#implicit-conversions

The text means to say "rejected" but says "represented".

proposals/p0144.md

@@ -171,7 +171,7 @@ value. Conversions in which `x` lies exactly half-way between two values are
 rejected, as
 [previously decided](/docs/design/lexical_conventions/numeric_literals.md).
 Conversions in which `x` is outside the range of finite values of the
-floating-point type are also represented, rather than saturating to the finite
+floating-point type are also rejected, rather than saturating to the finite
 range or producing an infinity.
 
 ### Examples