build-unit-test-docker: upgrade meson to 1.1.1

Yocto now includes Meson 1.1.1, which also happens to support
the `cpp_std=cpp23` option.  Update the Docker container so
repositories could begin using C++23.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I3388d3d872e1f43cf783214d55f03ec4ec05d9a8
1 file changed