Shift+Alt+A
Here you can find all the keyboard shortcuts.
All VSCode Shortcuts
PS: I prefer Ctrl+Shift+/ for toggling block comments because Ctrl+/ is shortcut for toggling line comments so it's naturally easier to remember. To do so, just click on the settings icon in the bottom left of the screen and click 'Keyboard Shortcuts' and find "toggle block...". Then click and enter your desired combination.
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…