Document the release process

[sylvestre]

No description provided.

[Copilot]

PR Overview

This PR documents the release process to help contributors understand the necessary steps to prepare a new release.

• Adds a new "Preparing a new release" section with step-by-step instructions.
• Provides commands for version updating, tagging, and publishing the release.

Reviewed Changes

File	Description
DEVELOPMENT.md	Added a new release preparation section to document the workflow.

Copilot reviewed 1 out of 1 changed files in this pull request and generated no comments.

[github-actions]

GNU testsuite comparison:

Skip an intermittent issue tests/timeout/timeout (fails in this run but passes in the 'main' branch)
Skipping an intermittent issue tests/misc/stdbuf (passes in this run but fails in the 'main' branch)

[github-actions]

GNU testsuite comparison:

Skip an intermittent issue tests/misc/usage_vs_getopt (fails in this run but passes in the 'main' branch)
Skip an intermittent issue tests/timeout/timeout (fails in this run but passes in the 'main' branch)
Skipping an intermittent issue tests/misc/stdbuf (passes in this run but fails in the 'main' branch)

[cakebaker]

Looks good as far as I can tell. A hint to check if the assets are present could be helpful.

[github-actions]

GNU testsuite comparison:

Skip an intermittent issue tests/timeout/timeout (fails in this run but passes in the 'main' branch)
Skipping an intermittent issue tests/misc/stdbuf (passes in this run but fails in the 'main' branch)