fix(deps): bump CBR and IBM provider

[shemau]

Description

Update terraform terraform-ibm-modules/cbr/ibm to v1.28.1
Update required provider version to >= 1.70.0 to pick up the fix for this provider issue: IBM-Cloud/terraform-provider-ibm#5590

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Release notes content

Update terraform terraform-ibm-modules/cbr/ibm to v1.28.1
Update required provider version to >= 1.70.0 to pick up the fix for this provider issue: IBM-Cloud/terraform-provider-ibm#5590

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[shemau]

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[shemau]

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[terraform-ibm-modules-ops]

🎉 This PR is included in version 1.18.12 🎉

The release is available on:

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• v1.18.12

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