fix: pass region to sts service

[github-actions[bot]]

File	Coverage
All files	56%	:white_check_mark:
src/aws-provider/aws-account-access.ts	50%	:white_check_mark:
src/aws-provider/aws-events.ts	86%	:white_check_mark:
src/aws-provider/aws-organization-reader.ts	68%	:white_check_mark:
src/aws-provider/aws-organization-writer.ts	22%	:x:
src/aws-provider/aws-organization.ts	90%	:white_check_mark:
src/aws-provider/util.ts	55%	:white_check_mark:
src/build-tasks/build-configuration.ts	70%	:white_check_mark:
src/build-tasks/build-runner.ts	14%	:x:
src/build-tasks/build-task-provider.ts	54%	:white_check_mark:
src/build-tasks/tasks/include-task.ts	52%	:white_check_mark:
src/build-tasks/tasks/organization-task.ts	66%	:white_check_mark:
src/build-tasks/tasks/update-stacks-task.ts	72%	:white_check_mark:
src/cfn-binder/cfn-binder.ts	76%	:white_check_mark:
src/cfn-binder/cfn-sub-expression.ts	77%	:white_check_mark:
src/cfn-binder/cfn-task-provider.ts	9%	:x:
src/cfn-binder/cfn-task-runner.ts	61%	:white_check_mark:
src/cfn-binder/cfn-template.ts	86%	:white_check_mark:
src/cfn-binder/cfn-validate-task-provider.ts	22%	:x:
src/change-set/change-set-provider.ts	57%	:white_check_mark:
src/commands/base-command.ts	26%	:x:
src/commands/create-organization-changeset.ts	71%	:white_check_mark:
src/commands/delete-stacks.ts	41%	:white_check_mark:
src/commands/describe-stacks.ts	95%	:white_check_mark:
src/commands/init-organization-pipeline.ts	54%	:white_check_mark:
src/commands/init-organization.ts	68%	:white_check_mark:
src/commands/perform-tasks.ts	75%	:white_check_mark:
src/commands/print-org.ts	64%	:white_check_mark:
src/commands/print-stacks.ts	50%	:white_check_mark:
src/commands/print-tasks.ts	59%	:white_check_mark:
src/commands/remove.ts	59%	:white_check_mark:
src/commands/update-organization.ts	74%	:white_check_mark:
src/commands/update-stacks.ts	68%	:white_check_mark:
src/commands/validate-organization.ts	26%	:x:
src/commands/validate-stacks.ts	83%	:white_check_mark:
src/commands/validate-tasks.ts	80%	:white_check_mark:
src/core/cfn-expression-resolver.ts	72%	:white_check_mark:
src/core/default-task-runner.ts	74%	:white_check_mark:
src/core/generic-task-runner.ts	84%	:white_check_mark:
src/core/cfn-functions/cfn-cmd.ts	25%	:x:
src/core/cfn-functions/cfn-find-in-map.ts	57%	:white_check_mark:
src/core/cfn-functions/cfn-functions.ts	93%	:white_check_mark:
src/core/cfn-functions/cfn-join.ts	49%	:white_check_mark:
src/core/cfn-functions/cfn-md5.ts	48%	:white_check_mark:
src/core/cfn-functions/cfn-merge.ts	20%	:x:
src/core/cfn-functions/cfn-read-file.ts	27%	:x:
src/core/cfn-functions/cfn-select.ts	10%	:x:
src/core/cfn-functions/cfn-sub.ts	35%	:x:
src/org-binder/org-binder.ts	49%	:white_check_mark:
src/org-binder/org-task-runner.ts	46%	:white_check_mark:
src/org-binder/org-tasks-provider.ts	17%	:x:
src/parser/parser.ts	83%	:white_check_mark:
src/parser/validator.ts	76%	:white_check_mark:
src/parser/model/account-resource.ts	78%	:white_check_mark:
src/parser/model/cloudformation-resource.ts	88%	:white_check_mark:
src/parser/model/master-account-resource.ts	81%	:white_check_mark:
src/parser/model/organization-bindings-section.ts	96%	:white_check_mark:
src/parser/model/organization-root-resource.ts	84%	:white_check_mark:
src/parser/model/organization-section.ts	89%	:white_check_mark:
src/parser/model/organizational-unit-resource.ts	95%	:white_check_mark:
src/parser/model/password-policy-resource.ts	90%	:white_check_mark:
src/parser/model/resource.ts	93%	:white_check_mark:
src/parser/model/resources-section.ts	92%	:white_check_mark:
src/plugin/plugin-binder.ts	70%	:white_check_mark:
src/plugin/plugin-command.ts	85%	:white_check_mark:
src/plugin/plugin-task.ts	14%	:x:
src/plugin/plugin-util.ts	42%	:white_check_mark:
src/plugin/impl/cdk-build-task-plugin.ts	54%	:white_check_mark:
src/plugin/impl/rp-build-task-plugin.ts	27%	:x:
src/plugin/impl/s3-copy-build-task-plugin.ts	50%	:white_check_mark:
src/plugin/impl/sls-build-task-plugin.ts	51%	:white_check_mark:
src/plugin/impl/tf-apply-task-plugin.ts	15%	:x:
src/state/persisted-state.ts	69%	:white_check_mark:
src/state/storage-provider.ts	20%	:x:
src/util/aws-util.ts	21%	:x:
src/util/child-process-util.ts	16%	:x:
src/util/console-util.ts	59%	:white_check_mark:
src/util/file-util.ts	41%	:white_check_mark:
src/util/global-state.ts	55%	:white_check_mark:
src/util/initial-commit-util.ts	24%	:x:
src/util/md5-util.ts	19%	:x:
src/util/resource-util.ts	91%	:white_check_mark:
src/writer/default-template-writer.ts	78%	:white_check_mark:
src/yaml-cfn/index.ts	52%	:white_check_mark:
src/yaml-cfn/nunjucks-parse-includes.ts	67%	:white_check_mark:

Minimum allowed coverage is 40%

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