Advance RFC #0999 `"Make (hash) a built in helper"` to Stage Released #2365

Job	Run time
Does PR add RFCs?	8s
Only one RFC can be added in a PR	0s
Filename matches RFC number	0s
Stage must be 'Exploring' (via label) for new RFC before merging	0s
RFC must be in only one stage before merging (labels)	0s
Verify Accepted PR URL is correct	-1s
Frontmatter stage must be 'accepted' before merging	-1s
	6s

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