containerize: fix typo in documentation (#22331)

Before this fix, `spack containerize` complains that `centos/7` is invalid
(should have been `centos:7`)
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Wouter Deconinck 2021-03-16 16:02:26 -05:00 committed by GitHub
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@ -227,7 +227,7 @@ following ``spack.yaml``:
container: container:
images: images:
os: centos/7 os: centos:7
spack: 0.15.4 spack: 0.15.4
uses ``spack/centos7:0.15.4`` and ``centos:7`` for the stages where the uses ``spack/centos7:0.15.4`` and ``centos:7`` for the stages where the