no way to disable pull request description as default squash merge commit message details

Feature Description

I'm trying to get gitea behavior like this github option:

There is no same option in gitea so I try to use default merge message to achieve this.

The .gitea/default_merge_message/SQUASH_TEMPLATE.md allow users to override default squash message but gitea will always prepend pull request description as commit message details

for example, for pull request

fix: something

hello

and template .gitea/default_merge_message/SQUASH_TEMPLATE.md

${PullRequestTitle} (${PullRequestReference})

test

the default commit message details will always be

hello

test

instead of expected text only

Screenshots