refactor: use const double for parameter in stats/base/dists/betaprime/logpdf

PR-URL: #6452

Reviewed-by: Philipp Burckhardt <[email protected]>

Author: Neerajpathak07

lib/node_modules/@stdlib/stats/base/dists/betaprime/logpdf/src/main.c

@@ -34,7 +34,7 @@
 * double y = stdlib_base_dists_beta_logpdf( 0.5, 1.0, 1.0 );
 * // returns ~-0.811
 */
-double stdlib_base_dists_betaprime_logpdf( const double x, double alpha, const double beta ) {
+double stdlib_base_dists_betaprime_logpdf( const double x, const double alpha, const double beta ) {
 	double out;
 	if (
 		stdlib_base_is_nan( x ) ||