fixed formatting in main (only for test case but good learning opportunity)

cmd/rpi5-health/main.go

@@ -15,9 +15,9 @@ func main() {
 
 	const GB = 1024 * 1024 * 1024
 
-	log.Printf("Total memory: %dGB\n", memInfo.SystemMemory/GB)
+	log.Printf("Total memory: %.2fGB\n", float64(memInfo.SystemMemory)/GB)
-	log.Printf("Available memory: %dGB\n", memInfo.AvailableMemory/GB)
+	log.Printf("Available memory: %.2fGB\n", float64(memInfo.AvailableMemory)/GB)
-	log.Printf("Used memory: %dGB\n", memInfo.GetUsedMemory()/GB)
+	log.Printf("Used memory: %.2fGB\n", float64(memInfo.GetUsedMemory())/GB)
 
 	cli.Listen()
 }