chore(deps): bump pdm-project/update-deps-action from 1.7 to 1.8

Bumps [pdm-project/update-deps-action](https://github.com/pdm-project/update-deps-action) from 1.7 to 1.8.
- [Release notes](https://github.com/pdm-project/update-deps-action/releases)
- [Commits](pdm-project/update-deps-action@v1.7...v1.8)

---
updated-dependencies:
- dependency-name: pdm-project/update-deps-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/update-pdm-deps.yaml

@@ -12,7 +12,7 @@ jobs:
       - uses: actions/checkout@v4.1.6
 
       - name: Update dependencies
-        uses: pdm-project/update-deps-action@v1.7
+        uses: pdm-project/update-deps-action@v1.8
         with:
           # A personal access token (PAT) must be used so that the created PR triggers CI
           # https://docs.github.com/en/actions/security-guides/automatic-token-authentication#using-the-github_token-in-a-workflow