feat: specify the configuration path to use NRF version 1.6.0 #1706

Job	Run time
lib-needs-publishing	2s
CodeQL Analysis / CodeQL Analysis (python)	1m 16s
check-libraries / check-libraries	2s
lint-report / lint-report	15s
static-analysis / static-analysis	32s
terraform-check / Check Terraform	14s
unit-tests-with-coverage / unit-tests	23s
build / build-charm-under-test	15m 39s
integration-test / integration-test	6h 0m 15s
Publish Charm	0s
Publish Developer Charm To Branch	0s
Publish Lib	0s
	6h 18m 38s

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