feat(t-logpdf): fixing readme

Author: Aadish Jain

lib/node_modules/@stdlib/stats/base/dists/t/logpdf/README.md

@@ -170,7 +170,7 @@ for ( i = 0; i < 10; i++ ) {
 
 #### stdlib_base_dists_arcsine_cdf( x, a, b )
 
-Returns a `function` for evaluating the natural logarithm of the [PDF][pdf] of a [Student's t][t-distribution] distribution with degrees of freedom `v`.
+Evaluates the natural logarithm of the [PDF][pdf] for a [Student's t][t-distribution] distribution with degree of freedom `v`.
 
 ```c
 double out = stdlib_base_dists_t_logpdf( 0.5, 1.0 );