Example syntax for capture inlay hints setting is outdated

[timsueberkrueb]

Captures example in Effekt VSCode settings uses the following outdated syntax:

The current syntax is (where ' is used to indicate the inlay hint part, the real syntax is unquoted - better ideas welcome):

def main() 'at {io}': Unit = println("Hello Effekt!")

The following part of package.json needs to be adjusted: https://github.com/effekt-lang/effekt-vscode/blob/master/package.json#L153