This updates smmap's CI configuration in ways that are in line withrecent updates to gitdb's. In most cases there is no difference inthe changes, and the reason for the updates is more to avoidconfusing differences than from the value of the changesthemselves. In one case, there is a major difference (fetch-depth).-gitpython-developers/gitdb#89 (same)-gitpython-developers/gitdb#90 (same)  It's just the project, not dependencies, but otherwise the same.-gitpython-developers/gitdb#92 (opposite)  This is the major difference. We don't need more than the tip of  the branch in these tests. Keeping the default fetch-depth of 1  by not setting it explicitly avoids giving the impression that  the tests here are doing something they are not (and also serves  as a speed optimization).-gitpython-developers/gitdb#93 (same)

Update CI, in line with gitdb

+ Make YAML indentation more consistent.

Since Python 3.12.0 stable has been released and is available viasetup-python, per:https://github.com/actions/python-versions/blob/main/versions-manifest.jsonThis makes it so continue-on-error and allow-prereleases are nolonger special-cased to true for 3.12; instead, 3.12 is treaed thesame as other Python releases (where those are false).

No longer treat 3.12 as experimental on smmap CI

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 4 to 5.- [Release notes](https://github.com/actions/setup-python/releases)- [Commits](actions/setup-python@v4...v5)---updated-dependencies:- dependency-name: actions/setup-python  dependency-type: direct:production  update-type: version-update:semver-major...Signed-off-by: dependabot[bot] <support@github.com>

…tions/actions/setup-python-5Bump actions/setup-python from 4 to 5

This uses NamedTemporaryFile with delete=False to replace the oneuse of the deprecated mktemp function in smmap (reported in#41).This avoids the race condition inherent to mktemp, as the file isnamed and created together in a way that is effectively atomic.Because NamedTemporaryFile is not being used to automaticallydelete the file, it use and cleanup are unaffected by the change.

Replace use of mktemp

BSD is amiguous. So let's use the correct SPDX identifier.https://spdx.org/licenses/

Use SPDX identifier