gitlab: build the correct microblaze target

We inadvertently built the LE target for BE tests.

Fixes: 78ebc00 (gitlab: shuffle some targets and reduce avocado noise)
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20231201093633.2551497-7-alex.bennee@linaro.org>

.gitlab-ci.d/buildtest.yml

@@ -41,7 +41,7 @@ build-system-ubuntu:
   variables:
     IMAGE: ubuntu2204
     CONFIGURE_ARGS: --enable-docs
-    TARGETS: alpha-softmmu microblazeel-softmmu mips64el-softmmu
+    TARGETS: alpha-softmmu microblaze-softmmu mips64el-softmmu
     MAKE_CHECK_ARGS: check-build
 
 check-system-ubuntu: