fix(deps): update terraform terraform-ibm-modules/cos/ibm to v8.11.7

[terraform-ibm-modules-ops]

This PR contains the following updates:

Package	Type	Update	Change
terraform-ibm-modules/cos/ibm (source)	module	patch	8.11.6 -> 8.11.7

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Release Notes

terraform-ibm-modules/terraform-ibm-cos (terraform-ibm-modules/cos/ibm)

### [`v8.11.7`](https://togithub.com/terraform-ibm-modules/terraform-ibm-cos/releases/tag/v8.11.7) [Compare Source](https://togithub.com/terraform-ibm-modules/terraform-ibm-cos/compare/v8.11.6...v8.11.7) ##### Bug Fixes - **deps:** update terraform terraform-ibm-modules/kms-all-inclusive/ibm to v4.15.11 ([#​716](https://togithub.com/terraform-ibm-modules/terraform-ibm-cos/issues/716)) ([b992f2a](https://togithub.com/terraform-ibm-modules/terraform-ibm-cos/commit/b992f2aec1af48758c7b91625aacb52411c13d13))

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[terraform-ibm-modules-dev]

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:tada: This PR is included in version 1.12.9 :tada:

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