QSsl: Remove enum value gaps

These value gaps were there for binary compatibility, but we don't need
those in Qt 6.

Change-Id: I72a40d601b61f90e14562578e88493b0d54ff398
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>

src/network/ssl/qssl.h

@@ -73,11 +73,11 @@ namespace QSsl {
     };
 
     enum SslProtocol {
-        TlsV1_0 = 2,
+        TlsV1_0,
         TlsV1_1,
         TlsV1_2,
         AnyProtocol,
-        SecureProtocols = AnyProtocol + 2,
+        SecureProtocols,
 
         TlsV1_0OrLater,
         TlsV1_1OrLater,