Bump intel microcode to 20250812

Signed-off-by: Gabriel Chabot <gabriel.chabot@qarnot-computing.com>

Author: gabchab

kernel/Dockerfile

@@ -71,7 +71,7 @@ WORKDIR /tmp
 # Download Intel ucode, create a CPIO archive for it, and keep it in the build context
 # so the firmware can also be referenced with CONFIG_EXTRA_FIRMWARE
 ENV UCODE_REPO=https://github.com/intel/Intel-Linux-Processor-Microcode-Data-Files
-ENV UCODE_COMMIT=microcode-20250211
+ENV UCODE_COMMIT=microcode-20250812
 RUN set -e && \
     if [ $(uname -m) == x86_64 ]; then \
         git clone ${UCODE_REPO} ucode && \