docs: fix use of %f

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---

Author: anandkaranubc

lib/node_modules/@stdlib/math/base/special/acotf/README.md

@@ -140,7 +140,7 @@ int main( void ) {
     int i;
     for ( i = 0; i < 10; i++ ) {
         v = stdlib_base_acotf( x[ i ] );
-        printf( "acot(%0.4f) = %0.4f\n", x[ i ], v );
+        printf( "acot(%f) = %f\n", x[ i ], v );
     }
 }
 ```