Update dependency PyYAML to v6 (master)

[renovate-confluentinc-fetcher]

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This PR contains the following updates:

Package	Update	Change
PyYAML	major	~=5.4.1 -> >=5.4.1,<6.1

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Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• [ ] If you want to rebase/retry this PR, check this box

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This PR has been generated by Renovate Bot.

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⚠️ Artifact update problem

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

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: undefined

Command failed: export PIP_CONFIG_FILE=/home/ubuntu/.config/pip/pip.conf && bazel run //:requirements.update
WARNING: Invoking Bazel in batch mode since it is not invoked from within a workspace (below a directory having a WORKSPACE file).
OpenJDK 64-Bit Server VM warning: Options -Xverify:none and -noverify were deprecated in JDK 13 and will likely be removed in a future release.
ERROR: The 'run' command is only supported from within a workspace (below a directory having a WORKSPACE file).
See documentation at https://bazel.build/concepts/build-ref#workspace

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