docs/api/ fix link to mg_printf md page

Signed-off-by: Lorenzo Canepa <paperino1983@gmail.com>

docs/api/mg_send_chunk.md

@@ -25,7 +25,7 @@ The function returns a number **>0** if data was sent, the value **0** when the
 ### See Also
 
 * [`mg_write();`](mg_write.md)
-* [`mg_printf();`](mg_print.md)
+* [`mg_printf();`](mg_printf.md)
 * [`mg_lock_connection();`](mg_lock_connection.md)
 * [`mg_unlock_connection();`](mg_unlock_connection.md)
 

docs/api/mg_send_digest_access_authentication_request.md

@@ -31,5 +31,5 @@ The function returns a negative number on errors.
 * [`mg_modify_passwords_file();`](mg_modify_passwords_file.md)
 * [`mg_send_http_error();`](mg_send_http_error.md)
 * [`mg_write();`](mg_write.md)
-* [`mg_printf();`](mg_print.md)
+* [`mg_printf();`](mg_printf.md)
 

docs/api/mg_write.md

@@ -23,7 +23,7 @@ The function `mg_write()` can be used to send a blob of arbitrary data over a co
 ### See Also
 
 * [`mg_lock_connection();`](mg_lock_connection.md)
-* [`mg_printf();`](mg_print.md)
+* [`mg_printf();`](mg_printf.md)
 * [`mg_unlock_connection();`](mg_unlock_connection.md)
 * [`mg_websocket_client_write();`](mg_websocket_client_write.md)
 * [`mg_websocket_write();`](mg_websocket_write.md)