docs: update README with proper print info in examples

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Author: anandkaranubc

lib/node_modules/@stdlib/stats/base/dists/chisquare/mgf/README.md

@@ -179,8 +179,7 @@ for ( i = 0; i < 10; i++ ) {
 
 #### stdlib_base_dists_chisquare_mgf( t, k )
 
-Evaluates the moment-generating function (MGF) for a chi-squared distribution
-* with degrees of freedom `k` at a value `t`.
+Evaluates the moment-generating function (MGF) for a chi-squared distribution with degrees of freedom `k` at a value `t`.
 
 ```c
 double out = stdlib_base_dists_chisquare_mgf( 0.4, 2.0 );
@@ -236,7 +235,7 @@ int main( void ) {
 
         result = stdlib_base_dists_chisquare_mgf( t, k );
 
-        printf( "t: %lf, k: %lf, MGF: %lf \n", t, k, result );
+        printf( "t: %lf, k: %lf, M_X(t;k): %lf \n", t, k, result );
     }
 
     return 0;