Feat(ci): Auto changelog with PR title instead

[hoangdv2429]

PR Standards

Opening a pull request should be able to meet the following requirements

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For Author:

• Targeted PR against correct branch
• included the correct type prefix in the PR title
• Linked to Github issue with discussion and accepted design
• Targets only one github issue
• Wrote unit and integration tests
• All CI checks have passed
• Added relevant godoc comments

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For Reviewer:

• confirmed the correct type prefix in the PR title
• Reviewers assigned
• confirmed all author checklist items have been addressed

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After reviewer approval:

• In case targets main branch, PR should be squashed and merged.
• In case PR targets a release branch, PR should be rebased.

[mtsitrin]

@hoangdv2429 can we have the changelog update created as separate PR?
currently, existing PRs got pushed with changelog updates, which makes mess and conflicts.

IMO it should be that when main has new commit, a new PR will be created with changelog update.
and not pushing this to existing open PRs

[hoangdv2429]

I have one pr open do exactly that in rollapp-evm. I want to make sure it work first in rollapp-evm and then backport it