fix nrpe dashboard variables and selectors (#123) #22

Job	Run time
release / Quality Checks / Check the CHARMHUB_TOKEN secret	1s
release / Quality Checks / Static Analysis / Static Analysis of Charm	20s
release / Quality Checks / Inclusive naming / check	5s
release / Quality Checks / Scenario Tests / Scenario tests	17s
release / Quality Checks / Linting / Lint	14s
release / Quality Checks / Static Analysis / Static Analysis of Libs	28s
release / Quality Checks / Unit Tests / Unit tests	22s
release / Quality Checks / Check libraries	35s
release / Quality Checks / Integration Tests / Integration Tests	7m 18s
release / Quality Checks / CodeQL analysis / Analyze (python)	1m 49s
release / Release any bumped charm library	27s
release / Release Charm and Libraries / Build the charms	3m 37s
release / Release Charm and Libraries / Build the charms for ARM	3m 25s
release / Release Charm and Libraries / Release arm64 to CharmHub (./cos-proxy_ubuntu-20.04-arm64_ubuntu-22.04-arm64.charm)	43s
release / Release Charm and Libraries / Charm List	1s
release / Release Charm and Libraries / Release to CharmHub (./cos-proxy_ubuntu-20.04-amd64_ubuntu-22.04-amd64.charm)	40s
	20m 22s

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