Update wyoming-piper version (#34)

This should fix some issues that can happen after updating Home Assistant to 2025.8

Author: Victorsueca

Dockerfile

@@ -2,7 +2,7 @@
 FROM nvidia/cuda:11.8.0-cudnn8-runtime-ubuntu22.04 AS build
 
 ARG TARGETARCH=linux_x86_64
-ARG WYOMING_PIPER_VERSION="1.6.1"
+ARG WYOMING_PIPER_VERSION="1.6.3"
 ARG PIPER_VERSION="1.2.0"
 ARG PIPER_PHONEMIZE_VERSION="1.1.0"