fix(csharp): correct adventure name 'elodoria' -> 'eldoria' in Program help text

The help text printed when no adventure argument is supplied listed
'elodoria' as a valid name, but the switch case in the same file handles
'eldoria'. Users following the hint ended up in the default branch with
'Unknown option: elodoria'. Align the hint with the real case label.

Closes #41. dotnet build succeeds with 0 warnings / 0 errors.

Author: SAY-5

Solutions/CSharp/Program.cs

@@ -6,7 +6,7 @@ public static void Main(string[] args)
         var adventure = args?.FirstOrDefault()?.ToLower();
         if (string.IsNullOrWhiteSpace(adventure))
         {
-            Console.WriteLine("Please specify which logic to run: Sample names include: algora, chamberofechoes, elodoria, lumoria, mythos, mythos-test, stonevale, tempora.");
+            Console.WriteLine("Please specify which logic to run: Sample names include: algora, chamberofechoes, eldoria, lumoria, mythos, mythos-test, stonevale, tempora.");
             adventure = Console.ReadLine();
         }