ci: bump ansys/actions from 4 to 7 in the actions group

Bumps the actions group with 1 update: [ansys/actions](https://github.com/ansys/actions).


Updates `ansys/actions` from 4 to 7
- [Release notes](https://github.com/ansys/actions/releases)
- [Commits](ansys/actions@v4...v7)

---
updated-dependencies:
- dependency-name: ansys/actions
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/ci_cd.yml

@@ -52,7 +52,7 @@ jobs:
       fail-fast: false
     steps:
       - name: "Run tests"
-        uses: ansys/actions/tests-pytest@v4
+        uses: ansys/actions/tests-pytest@v7
         with:
           pytest-extra-args: ${{ matrix.cfg.extra-args }}