update subcollection in ref architecture

[SirSpidey]

Description

existing metadata is for docs-only reference architecture

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[SirSpidey]

/run pipeline

[ocofaigh]

/run pipeline

[terraform-ibm-modules-ops]

:tada: This PR is included in version 1.0.0 :tada:

The release is available on:

• GitHub release
• v1.0.0

Your semantic-release bot :package::rocket: