Add ex1.ws2812b example code

guowenxue

10 days ago a40997aa12029f24ef0904d9af6415c975c4322f

 ex1.buzzer-music/.vscode/tasks.json

@@ -6,8 +6,8 @@
            "type": "shell",
            "command": "D:\\Program Files\\ST\\STM32CubeProgrammer\\bin\\STM32_Programmer_CLI.exe",
            "args": [
                "-c",
                "port=SWD",
                "-c port=SWD",
                "-e all",
                "-w",
                "${workspaceFolder}\\build\\Release\\ISKBoard.elf",
                "0x08000000",