Fix create-release script to work with any CWD

[silesky]

Publishing is broken (when running a workspace command, CWD is set to the package, rather than the root). It should now work regardless of where the script is called from.

Can be tested by doing:

DRY_RUN=1 TAGS=@segment/analytics-next@1.61.0 yarn ts-node-script scripts/create-release-from-tags/run.ts
DRY_RUN=1 TAGS=@segment/analytics-next@1.61.0 yarn scripts create-release-from-tags

[changeset-bot]

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Latest commit: 1d62e21

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