Fix MatrixArgs.element and Update cmr #24

Job	Run time
List changed packages	1m 28s
site	0s
test / linux (ubuntu-focal, standard)	7m 32s
test / linux (ubuntu-focal, minimal)	7m 46s
test / linux (ubuntu-jammy, standard)	5m 35s
test / linux (ubuntu-jammy, minimal)	7m 36s
test / linux (ubuntu-mantic, standard)	8m 23s
test / linux (ubuntu-mantic, minimal)	7m 40s
test / linux (debian-bullseye, standard)	7m 26s
test / linux (debian-bullseye, minimal)	7m 41s
test / linux (debian-bookworm, standard)	7m 22s
test / linux (debian-bookworm, minimal)	6m 36s
test / linux (fedora-30, standard)	8m 37s
test / linux (fedora-30, minimal)	7m 3s
test / linux (fedora-38, standard)	7m 35s
test / linux (fedora-38, minimal)	6m 41s
test / linux (gentoo-python3.11, standard)	11m 24s
test / linux (gentoo-python3.11, minimal)	13m 20s
test / linux (debian-bullseye-i386, standard)	7m 9s
test / linux (debian-bullseye-i386, minimal)	8m 15s
	2h 25m 9s

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