Fix bad serials (#304)

- [X] Fixes bad serial calculations
- [X] Tightens HexStrings

Bumps release version
Updates documentation

Projects/UOContent/Accounting/Security/SHA2PasswordProtection.cs

@@ -30,7 +30,7 @@ namespace Server.Accounting.Security
             var bytes = new byte[Encoding.ASCII.GetByteCount(password)];
             Encoding.ASCII.GetBytes(password, bytes);
 
-            return HexStringConverter.GetString(m_SHA2HashProvider.ComputeHash(bytes));
+            return m_SHA2HashProvider.ComputeHash(bytes).ToHexString();
         }
 
         public bool ValidatePassword(string encryptedPassword, string plainPassword) =>