feat(checksums): Add checksum for Erlang 27.3.4.12 (#20)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: github-actions[bot]

data/erlang.json

@@ -127,6 +127,7 @@
   "27.3.4.1": "sha256-L9VgcdO1TyLNm+vke90w6Xuq/T3uKzmU4d0uYEfyQlc=",
   "27.3.4.10": "sha256-x1f9r1t5Ckk+AVn2P372aWLoDtgqZzNIeOuzjI6hm+g=",
   "27.3.4.11": "sha256-yOgsaeUv6GwFX6qPVb28zet6Hli5vg/PZCKW2s2/JEA=",
+  "27.3.4.12": "sha256-RnCBGuqEEJ+3kkbiVNLSb8sAh2i9SNyH9ixkqtAbjsk=",
   "27.3.4.3": "sha256-p4M1PPrbpNq6la4kgTTCOa2f5/oYxNwMaSi59mhlM4o=",
   "27.3.4.4": "sha256-iHpEYXzaso1ZK9XLrT04t+BoX2Y6nSbT9rNjY1JoHPM=",
   "27.3.4.5": "sha256-6kFixIy74ACvNBhPWoUQDCH6N2KJ++5xAEqPQ9jvJ8o=",