Load NLog.config when not in AppContext.BaseDirectory instead

This is needed as custom NLog.config no longer gets loaded in single-file scenario, where NLog probes the directory of the unpacked files instead.

For non-single-publishes this doesn't change anything, as home directory is equal to base directory if not using custom path.

ArchiSteamFarm/ASF.cs

@@ -753,8 +753,8 @@ namespace ArchiSteamFarm {
 					case "":
 						// No directory, root folder
 						switch (fileName) {
+							case Logging.NLogConfigurationFile:
 							case SharedInfo.LogFile:
-							case "NLog.config":
 								// Files with those names in root directory we want to keep
 								continue;
 						}