chore: address commit comments for commit 75a786a (issue #7452)

Author: anmolsah

lib/node_modules/@stdlib/stats/base/dists/lognormal/pdf/README.md

@@ -56,7 +56,7 @@ var pdf = require( '@stdlib/stats/base/dists/lognormal/pdf' );
 
 #### pdf( x, mu, sigma )
 
-Evaluates the [probability density function][pdf] (PDF) for a [lognormal][lognormal-distribution] distribution with parameters `mu` (location parameter) and `sigma` (scale parameter).
+Evaluates the [probability density function][pdf] (PDF) of a [lognormal][lognormal-distribution] distribution with parameters `mu` (location parameter) and `sigma` (scale parameter).
 
 ```javascript
 var y = pdf( 2.0, 0.0, 1.0 );