va: Fix log message when registering H264 encoder.

The log message would report an error for the H264 decoder when
registering failed, but we tried to register the H264 encoder instead.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2974>

subprojects/gst-plugins-bad/sys/va/plugin.c

@@ -191,7 +191,7 @@ plugin_register_encoders (GstPlugin * plugin, GstVaDevice * device,
       case H264:
         if (!gst_va_h264_enc_register (plugin, device, sinkcaps, srccaps,
                 GST_RANK_NONE, entrypoint)) {
-          GST_WARNING ("Failed to register H264 decoder: %s",
+          GST_WARNING ("Failed to register H264 encoder: %s",
               device->render_device_path);
         }
         break;