docs: update copy

Co-authored-by: Karan Anand <[email protected]>
Signed-off-by: Athan <[email protected]>

Author: kgryte

lib/node_modules/@stdlib/math/base/special/chebyshev-t-polynomial/README.md

@@ -34,7 +34,7 @@ T_n(x) = \cos( n \cos^{-1}(x) )
 
 <!-- </equation> -->
 
-where `n >= 0` is the polynomial degree.
+where `n` is the polynomial degree.
 
 The [Chebyshev Polynomial][chebyshev-polynomial] of the first kind is related to the Gaussian hypergeometric function via the following equation