Changelog linting #19715

Job	Run time
fourmolu	41s
build (9.12.2, ubuntu-latest)	3m 14s
build (9.6.7, ubuntu-latest)	3m 26s
shellcheck	7s
gen-hie	3m 26s
Check branch history	12s
build (9.10.2, ubuntu-latest)	3m 16s
Check that there are no additions of `undefined`s in the PR diff	14s
build (9.8.4, ubuntu-latest)	3m 25s
changelog-lint	1m 16s
Check if formal-ledger-specifications SRP is valid	29s
cabal-format	6s
Tests completed	2s
${{ matrix.package }}-${{ matrix.ghc }}-${{ matrix.os }}	1s
codegen	1s
Send a slack notification on \#ledger-internal if the nightly build failed	1s
	19m 57s

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