[canary-publish] Fix create_release-related logic.

[yujeong-jeon]

Issue

• Update canary-publish, detect-add #19

Type of Work

• Bug Fix
• Feature Addition
• Code Improvement

Description of Work

• There is no tag when publish_script is changeset publish --no-git-tag like.
• Although user don't create git tag when publishing packages, canary action creates a git tag when gh release so that --no-git-tag is still acceptable.
• But, when getting commit logs based on this tag, an error occured because a tag is not created yet.
• So, I fixed logic of getting commit logs by getting logs between baseSha and headSha.
• Due to this modification, if create_release is true, user must set the @action/checkout with fetch-depth: 0 for getting correct release changelogs.

Review Points

Others

[yujeong-jeon]

I'll self merge for quick confirmation, I'm sorry.