Bump STEAMNETWORKINGSOCKETS_INTERFACE_VERSION.

(Not relevant to the opensource code, which does not have ABI backwards compat.)

Author: zpostfacto

include/steam/isteamnetworkingsockets.h

@@ -319,7 +319,7 @@ class ISteamNetworkingSockets
 protected:
 	~ISteamNetworkingSockets(); // Silence some warnings
 };
-#define STEAMNETWORKINGSOCKETS_INTERFACE_VERSION "SteamNetworkingSockets001"
+#define STEAMNETWORKINGSOCKETS_INTERFACE_VERSION "SteamNetworkingSockets002"
 
 extern "C" {