TF-M: qemu: dummy changes to update qemu version

Signed-off-by: Fathi Boudra <fathi.boudra@linaro.org>
Change-Id: Iccad84bb42281b0b1b5e83e92f2d486694712963
diff --git a/bullseye-amd64-tf-m-qemu/Dockerfile b/bullseye-amd64-tf-m-qemu/Dockerfile
index 3b50c21..822ce20 100644
--- a/bullseye-amd64-tf-m-qemu/Dockerfile
+++ b/bullseye-amd64-tf-m-qemu/Dockerfile
@@ -1,5 +1,6 @@
 FROM debian:sid-slim
 
+ENV QEMU_VERSION="1:5.2+dfsg-6"
 ENV DEBIAN_FRONTEND=noninteractive
 ENV PKG_DEPS="\
     ca-certificates \