demo: fix opencl-icd packages repository

Signed-off-by: Mikko Ylinen <mikko.ylinen@intel.com>

Author: mythi

demo/intel-opencl-icd/Dockerfile

@@ -3,7 +3,7 @@ FROM ubuntu:22.04
 ARG APT="env DEBIAN_FRONTEND=noninteractive apt"
 
 RUN ${APT} update && ${APT} install -y curl gpg-agent \
-    && echo 'deb [arch=amd64 signed-by=/usr/share/keyrings/intel-graphics.gpg] https://repositories.intel.com/graphics/ubuntu jammy main' | \
+    && echo 'deb [arch=amd64 signed-by=/usr/share/keyrings/intel-graphics.gpg] https://repositories.intel.com/graphics/ubuntu jammy flex' | \
        tee -a /etc/apt/sources.list.d/intel.list \
     && curl -s https://repositories.intel.com/graphics/intel-graphics.key | \
        gpg --dearmor --output /usr/share/keyrings/intel-graphics.gpg \