fix: update install suggestion for missing fyne command

This makes the install process more inline with the CI workflow, where
both are tested

internal/command/command.go

@@ -157,7 +157,7 @@ func printUsage(template string, data interface{}) {
 func checkFyneBinHost(ctx Context) (string, error) {
 	fyne, err := execabs.LookPath("fyne")
 	if err != nil {
-		return "", fmt.Errorf("missed requirement: fyne. To install: `go get fyne.io/fyne/v2/cmd/fyne` and add $GOPATH/bin to $PATH")
+		return "", fmt.Errorf("missed requirement: fyne. To install: `go install fyne.io/fyne/v2/cmd/fyne@latest` or `go get fyne.io/fyne/v2/cmd/fyne@latest` and add $GOPATH/bin to $PATH")
 	}
 
 	if debugging() {