docs: update stats/base/dists/frechet examples to use Greek symbols

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Author: Planeshifter

lib/node_modules/@stdlib/stats/base/dists/frechet/logcdf/README.md

@@ -259,7 +259,7 @@ int main( void ) {
         s = random_uniform( 0.0, 10.0 );
         m = random_uniform( 0.0, 10.0 );
         y = stdlib_base_dists_frechet_logcdf( x, alpha, s, m );
-        printf( "x: %lf, alpha: %lf, s: %lf, m: %lf, ln(F(x;alpha,s,m)): %lf\n", x, alpha, s, m, y );
+        printf( "x: %lf, α: %lf, s: %lf, m: %lf, ln(F(x;α,s,m)): %lf\n", x, alpha, s, m, y );
     }
 }
 ```

lib/node_modules/@stdlib/stats/base/dists/frechet/logcdf/examples/c/example.c

@@ -40,6 +40,6 @@ int main( void ) {
 		s = random_uniform( 0.0, 10.0 );
 		m = random_uniform( 0.0, 10.0 );
 		y = stdlib_base_dists_frechet_logcdf( x, alpha, s, m );
-		printf( "x: %lf, alpha: %lf, s: %lf, m: %lf, ln(F(x;alpha,s,m)): %lf\n", x, alpha, s, m, y );
+		printf( "x: %lf, α: %lf, s: %lf, m: %lf, ln(F(x;α,s,m)): %lf\n", x, alpha, s, m, y );
 	}
 }