v1.2.2: Updates GitHub Actions to avoid rate-limiting behavior

[jmuchovej]

Adds caching (in a between-run accessible manner) to avoid rate-limiting behavior by reducing the number of API-calls related to building child-block representations.

Caches (GitHub Artifacts) are stored for 90 days (GitHub limitation).

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This discussion was created from the release Updates GitHub Actions to avoid rate-limiting behavior.