chore(release): add release notes for 2.30.1-rc2

[armory-astrolabe]

Event

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        "chore(cd): update base service version to kayenta:2023.08.22.17.00.47.release-1.30.x (#463)"
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        "chore(cd): update base service version to fiat:2023.08.22.18.06.01.release-1.30.x (#515)"
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    "timestamp": "2023-08-23 17:49:50",
    "version": "2.30.1-rc2"
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}

[mknous]

LGTM