MAINT: Bump the testing group in /.devcontainer with 1 update (#2928)

Bumps the testing group in /.devcontainer with 1 update: [autopep8](https://github.com/hhatto/autopep8).


Updates `autopep8` from 2.0.4 to 2.1.0
- [Release notes](https://github.com/hhatto/autopep8/releases)
- [Commits](hhatto/autopep8@v2.0.4...v2.1.0)

---
updated-dependencies:
- dependency-name: autopep8
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: testing
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.devcontainer/codespaces-dev/requirements.txt

@@ -1,5 +1,5 @@
 ansys-dpf-core==0.10.1
-autopep8==2.0.4
+autopep8==2.1.0
 matplotlib==3.8.3
 scipy==1.12.0
 pandas==2.2.1

.devcontainer/devcontainer-local/requirements.txt

@@ -1,5 +1,5 @@
 ansys-dpf-core==0.10.1
-autopep8==2.0.4
+autopep8==2.1.0
 matplotlib==3.8.3
 scipy==1.12.0
 pandas==2.2.1