Bump linode-api4 from 5.38.0 to 5.40.0

Bumps [linode-api4](https://github.com/linode/linode_api4-python) from 5.38.0 to 5.40.0.
- [Release notes](https://github.com/linode/linode_api4-python/releases)
- [Commits](linode/linode_api4-python@v5.38.0...v5.40.0)

---
updated-dependencies:
- dependency-name: linode-api4
  dependency-version: 5.40.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements.txt

@@ -1 +1 @@
-linode-api4==5.38.0
+linode-api4==5.40.0