fix: fix bot login name

[170210]

Description

This PR fixes the bot name from "app/finschia-auto-pr[bot]" to "app/finschia-auto-pr", which makes the GitHub action unable to close previous work successfully.

Types of changes

• Bug fix (changes which fixes an issue)
• New feature (changes which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• ETC (build, ci, docs, perf, refactor, style, test)

Checklist

• I followed the contributing guidelines.
• I have updated the documentation accordingly. (no need)
• I have added tests to cover my changes. (no need)
• The PR title and commits are followed conventional commit form.