chore: add variable symbols

Co-authored-by: Philipp Burckhardt <[email protected]>
Signed-off-by: Shabareesh Shetty <[email protected]>

Author: ShabiShett07

lib/node_modules/@stdlib/stats/base/dists/gamma/logpdf/examples/c/example.c

@@ -37,6 +37,6 @@ int main( void ) {
 		alpha = random_uniform( 0.0, 20.0 );
         beta = random_uniform( 0.0, 20.0 );
 		y = stdlib_base_dists_gamma_logpdf( x, alpha, beta );
-		printf( "x: %lf, alpha: %lf, beta: %lf, LogPdf(X;x,alpha,beta): %lf\n", x, alpha, beta, y );
+		printf( "x: %lf, α: %lf, β: %lf, ln(f(x;α,β)):: %lf\n", x, alpha, beta, y );
 	}
 }