Format code with gofmt

This commit fixes the style issues introduced in 32edd9b according to the output
from gofmt.

Details: https://deepsource.io/gh/romanornr/autodealer/transform/6a50d8e7-b02f-478d-b72f-8bdf79af320f/

internal/singleton/dealer.go

@@ -47,4 +47,4 @@ func GetDealerInstance() *dealer.Dealer {
 // IsDealerInitialized function to check if dealer is initialized
 func IsDealerInitialized() bool {
 	return atomic.LoadUint32(&initialized) == 1
-}
+}