Fix typo in error message
Fix typo in error message

enricosada/VisualFSharpPowerTools,enricosada/VisualFSharpPowerTools,fsprojects/VisualFSharpPowerTools,vasily-kirichenko/FSharpVSPowerTools,bentayloruk/FSharpVSPowerTools,xperiandri/VisualFSharpPowerTools,yever/VisualFSharpPowerTools,dedale/VisualFSharpPowerTools,ovatsus/VisualFSharpPowerTools,cloudRoutine/VisualFSharpPowerTools,cloudRoutine/VisualFSharpPowerTools,isaacabraham/VisualFSharpPowerTools,fsprojects/VisualFSharpPowerTools,dkinitiate/VisualFSharpPowerTools,dungpa/PowerTools,smoothdeveloper/VisualFSharpPowerTools,forki/FSharpVSPowerTools,vasily-kirichenko/FSharpVSPowerTools,0x53A/VisualFSharpPowerTools