build: update Lotus Node and Miner version to v1.34.1-dev in master

[TippyFlitsUK]

Related Issues

#13269

Proposed Changes

• update Lotus Node and Miner version to v1.34.1-dev in master
• update Changelog

Checklist

Checklist

Before you mark the PR ready for review, please make sure that:

• Commits have a clear commit message.
• PR title conforms with contribution conventions
• Update CHANGELOG.md or signal that this change does not need it per contribution conventions
• New features have usage guidelines and / or documentation updates in
  • Lotus Documentation
  • Discussion Tutorials
• Tests exist for new functionality or change in behavior
• CI is green

[Copilot]

Pull Request Overview

Updates the Lotus Node and Miner version from v1.33.2-dev to v1.34.1-dev across all documentation and configuration files in preparation for the next development cycle.

• Version strings updated consistently across all components
• Changelog updated to reflect new unreleased version section
• Documentation files updated to show new version numbers

Reviewed Changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 3 comments.

File	Description
build/version.go	Updates NodeBuildVersion and MinerBuildVersion constants
documentation/en/cli-*.md	Updates version strings in CLI documentation
build/openrpc/*.json	Updates version field in OpenRPC API specifications
CHANGELOG.md	Restructures changelog for new v1.34.0 development cycle

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