feat: enable release branch option for tag action

[MSevey]

Overview

related to rollkit/rollkit#1362

this change has already been implemented and verified in celestia-app and celestia-node.

This flag is required when making releases not on main or master branches.

Checklist

• New and updated code has appropriate documentation
• New and updated code has new and/or updated testing
• Required CI checks are passing
• Visual proof for any user facing features like CLI or documentation updates
• Linked issues closed with keywords

Summary by CodeRabbit

• New Features

  • Introduced an optional release-branch parameter to specify the branch for tag generation in the release workflow.

• Documentation

  • Minor formatting improvements by removing trailing spaces.

• Chores

  • Cleaned up redundant formatting issues in documentation.

[coderabbitai]

Walkthrough

The project has introduced a new optional input parameter release-branch for the version release workflow, allowing users to specify a branch for tag generation, defaulting to "main" if unspecified. Additionally, there are minor cosmetic changes in the CONTRIBUTING.md file, where trailing spaces have been removed.

Changes

File Path	Change Summary
.github/actions/version-release/action.yml	Added optional release-branch input parameter; default set to "main".
CONTRIBUTING.md	Removed trailing spaces at the end of lines.

🐇✨
A hop, a skip, in the code we weave,
A branch anew, from which we leave.
No trailing space, no needless mark,
Clean and tidy, our coding lark. 🌿🚀

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