tools: fix failing release-proposal linter for LTS transitions #427

Job	Run time
Build slim tarball	1m 46s
aarch64-linux: with shared libraries	23m 12s
x86_64-darwin: with shared libraries	44m 36s
x86_64-linux: with shared libraries	27m 51s
aarch64-darwin: with shared libraries	32m 34s
	2h 9m 59s

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