[docs] fix typos

actions/printer.go

@@ -49,7 +49,7 @@ func (p Printer) GetExample() string {
 	return `
 		{
 			type: "Print",
-			"options: {
+			"options": {
 				"message": "Hello World!"
 			}
 		}

triggers/ethernet.go

@@ -95,7 +95,7 @@ func (p EthernetDisconnect) GetExample() string {
 		"options": {
 			"interfaceName": "eth0",
 			"waitTillConnected": true
-		}
+		},
 		"actions": [
 		]
 	}

triggers/timeout.go

@@ -54,7 +54,7 @@ func (p TimeOut) GetExample() string {
 		"name": "Example Trigger",
 		"options": {
 			"duration": 5
-		}
+		},
 		"actions": [
 		]
 	}

triggers/usb.go

@@ -96,7 +96,7 @@ func (p UsbDisconnect) GetExample() string {
 		"options": {
 			"deviceId": "ata-Samsung_SSD_860_EVO_1TB_S4AALKWJDI102",
 			"waitTillConnected": true
-		}
+		},
 		"actions": [
 		]
 	}