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

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---

Author: Planeshifter

lib/node_modules/@stdlib/stats/base/dists/degenerate/stdev/README.md

@@ -188,7 +188,7 @@ int main( void ) {
     for ( i = 0; i < 10; i++ ) {
         mu = random_uniform( -20.0, 20.0 );
         result = stdlib_base_dists_degenerate_stdev( mu );
-        printf( "mu: %lf, SD(X;µ): %lf \n", mu, result );
+        printf( "µ: %lf, SD(X;µ): %lf\n", mu, result );
     }
 }
 ```

lib/node_modules/@stdlib/stats/base/dists/degenerate/stdev/examples/c/example.c

@@ -33,6 +33,6 @@ int main( void ) {
 	for ( i = 0; i < 10; i++ ) {
 		mu = random_uniform( -20.0, 20.0 );
 		result = stdlib_base_dists_degenerate_stdev( mu );
-		printf( "mu: %lf, SD(X;µ): %lf \n", mu, result );
+		printf( "µ: %lf, SD(X;µ): %lf\n", mu, result );
 	}
 }