Improve release workflow to update settings submodule

[hohwille]

In ide repository we have a git submodule for ide-settings:

$ cat .gitmodules
[submodule "ide-settings"]
        path = settings/src/main/settings
        url = https://github.com/devonfw/ide-settings.git
        branch = master

With every release we also build a settings artifact with the current content of that repository.
I just did this manually as preparation for the actual release 2023.08.001 with this commit.
To avoid this manual overhead, it would be great if our release workflow would update this submodule automatically and commit the change before building and tagging the release here:

ide/.github/workflows/release.yml

Line 35 in 2db4c88

git add -f .mvn/maven.config