chore(deps): update terraform terraform-ibm-modules/observability-instances/ibm to v2.12.2

[terraform-ibm-modules-ops]

This PR contains the following updates:

Package	Type	Update	Change
terraform-ibm-modules/observability-instances/ibm (source)	module	patch	2.12.1 -> 2.12.2

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Release Notes

terraform-ibm-modules/terraform-ibm-observability-instances (terraform-ibm-modules/observability-instances/ibm)

### [`v2.12.2`](https://togithub.com/terraform-ibm-modules/terraform-ibm-observability-instances/releases/tag/v2.12.2) [Compare Source](https://togithub.com/terraform-ibm-modules/terraform-ibm-observability-instances/compare/v2.12.1...v2.12.2) ##### Bug Fixes - added missing depends_on for s2s auth policy creation when creating ATracker route with COS target ([#​475](https://togithub.com/terraform-ibm-modules/terraform-ibm-observability-instances/issues/475)) ([17df111](https://togithub.com/terraform-ibm-modules/terraform-ibm-observability-instances/commit/17df111ec2852680f8256b7b172bc90b5bbfcf07))

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[terraform-ibm-modules-dev]

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[terraform-ibm-modules-ops]

:tada: This PR is included in version 8.1.7 :tada:

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• v8.1.7

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