chore(deps): update dependency aar-doc to v2.1.0 #1363

Job	Run time
build (centosstream9, /lib/systemd/systemd)	7m 39s
build (rocky9, /lib/systemd/systemd)	8m 25s
build (rocky8, /lib/systemd/systemd)	8m 44s
build (fedora40, /lib/systemd/systemd)	8m 24s
build (fedora39, /lib/systemd/systemd)	8m 50s
build (debian11, /lib/systemd/systemd)	8m 15s
build (ubuntu2404, /lib/systemd/systemd)	8m 21s
build (ubuntu2204, /lib/systemd/systemd)	9m 2s
build (debian12, /lib/systemd/systemd)	8m 1s
build (ubuntu2004, /lib/systemd/systemd)	8m 46s
build (amazon2023, /lib/systemd/systemd)	7m 28s
build (arch, /lib/systemd/systemd)	7m 16s
build (opensuse_tumbleweed, /usr/lib/systemd/systemd)	6m 9s
	1h 45m 20s

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