tools: update tzdata to 2021a4

This updates the time zone database up to 2021a4 for the node v12.x-staging branch, following the documentation at https://github.com/nodejs/node/blob/master/doc/guides/maintaining-icu.md#time-zone-data This is essentially a backport of #40658. Refs: #40658
nodejs · Jan 8, 2022 · e797c22 · e797c22
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diff --git a/deps/icu-small/source/data/in/icudt67l.dat b/deps/icu-small/source/data/in/icudt67l.dat