docs: update wording

Signed-off-by: Philipp Burckhardt <[email protected]>

Author: Planeshifter

lib/node_modules/@stdlib/stats/base/dists/erlang/stdev/README.md

@@ -173,7 +173,7 @@ for ( i = 0; i < 10; i++ ) {
 
 #### stdlib_base_dists_erlang_stdev( k, lambda )
 
-Evaluates the [standard deviation][standard-deviation] of an [Erlang][erlang-distribution] distribution with parameters `k` (shape parameter) and `lambda` (rate parameter).
+Returns the [standard deviation][standard-deviation] of an [Erlang][erlang-distribution] distribution with parameters `k` (shape parameter) and `lambda` (rate parameter).
 
 ```c
 double out = stdlib_base_dists_erlang_stdev( 1, 1.0 );