refactor: configure Gemini reviewer to ignore lockfile and changelog #10289

Job	Run time
build	2m 24s
build-e2e-windows	2m 24s
lint	1m 46s
test	-1s
Browser Compatibility Tests	-1s
e2e-package-managers	0s
e2e-windows	0s
e2e	0s
e2e-snapshots	0s
publish-snapshots	-1s
	6m 31s

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