fix(deps): Update dependency pyarrow to v21

[cq-bot]

This PR contains the following updates:

Package	Type	Update	Change
pyarrow	dependencies	major	^19.0.1 -> ^21.0.0

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This PR has been generated by Renovate Bot.

[cq-bot]

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

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• any of the package files in this branch needs updating, or
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The artifact failure details are included below:

File name: poetry.lock

Updating dependencies
Resolving dependencies...


Because no versions of cloudquery-plugin-sdk match >0.1.47,<0.1.48 || >0.1.48
 and cloudquery-plugin-sdk (0.1.48) depends on pyarrow (19.0.1), cloudquery-plugin-sdk (>0.1.47) requires pyarrow (19.0.1).
And because cloudquery-plugin-sdk (0.1.47) depends on pyarrow (19.0.1), cloudquery-plugin-sdk (>=0.1.47) requires pyarrow (19.0.1).
So, because example depends on both cloudquery-plugin-sdk (>=0.1.47) and pyarrow (^21.0.0), version solving failed.