fix: Remove workflow file updates from Craft release automation

[vaind]

Summary

Fixes the Craft release failure by removing automatic workflow file updates that require GitHub App workflows permission.

Problem

The Craft release process failed with this error:

refusing to allow a GitHub App to create or update workflow `.github/workflows/danger.yml` without `workflows` permission

This happened because our PowerShell script tried to automatically update _workflow_version defaults in workflow files during the release, but GitHub Apps don't have workflows permission by default.

Solution

• Removes automatic workflow file updates from the PowerShell script
• Provides clear manual instructions for updating _workflow_version defaults after release
• Maintains the script structure for potential future use with proper permissions

Changes

• Modified scripts/update-version.ps1 to only display instructions instead of modifying workflow files
• Script now outputs clear manual action required message
• Prevents Craft release failures due to insufficient permissions

Manual Process

After each release is published, manually update:

• .github/workflows/updater.yml (line ~45)
• .github/workflows/danger.yml (line ~9)

Change the default value from the old version to the new version.

Test plan

• Test script runs without errors
• Verify script provides clear instructions
• Test Craft release process completes successfully

🤖 Generated with Claude Code

[github-actions]

	Fails
🚫	Please consider adding a changelog entry for the next release.

Instructions and example for changelog

Please add an entry to CHANGELOG.md to the "Unreleased" section. Make sure the entry includes this PR's number.

Example:

## Unreleased

### Fixes

- Remove workflow file updates from Craft release automation ([#112](https://github.com/getsentry/github-workflows/pull/112))

If none of the above apply, you can opt out of this check by adding #skip-changelog to the PR description or adding a skip-changelog label.

Generated by 🚫 dangerJS against a4ae257

[vaind]

replaced by #112