cli: Fix `jetpack changelog add` on a release branch #64029

Job	Run time
Changelogger use	20s
detect changed files	9s
Changelogger validity	31s
Copied files are in sync	10s
Project structure	2m 5s
PHP lint (7.0)	27s
PHP lint (7.2)	35s
PHP lint (7.4)	32s
ESLint (non-excluded files only)	2m 28s
PHP lint (8.0)	34s
PHP Compatibility	0s
PHP lint (8.1)	38s
PHP lint (8.2)	36s
PHP lint (8.3)	31s
PHP Code Sniffer (non-excluded files only)	0s
PHP Code Sniffer (changes to excluded files only)	0s
Check linter exclude lists	0s
ESLint (changes to excluded files only)	0s
Lint GitHub Actions yaml files	0s
Lock files are up to date	0s
Monorepo package version refs	0s
	9m 36s

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