Dockerifle: Update to python 3.11

Python 3.7 is already in EOL. We should move to a new version.

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Dockerfile

@@ -1,12 +1,12 @@
-FROM python:3.9-slim-bullseye AS build_gstreamer
+FROM python:3.11.7-slim-bullseye AS build_gstreamer
 
 # Build and Pre-Install Gstreamer
 COPY ./scripts/build_gst.sh /build_gst.sh
 RUN GST_VERSION=1.22.3 LIBCAMERA_VERSION=v0.0.4 \
     ./build_gst.sh && rm /build_gst.sh
 
 
-FROM python:3.9-slim-bullseye AS main
+FROM python:3.11.7-slim-bullseye AS main
 
 
 # Setup the user environment