build(deps): bump linode-cli

Bumps the linode-dependencies group with 1 update in the /.github directory: [linode-cli](https://github.com/linode/linode-cli).


Updates `linode-cli` from 5.55.0 to 5.56.1
- [Release notes](https://github.com/linode/linode-cli/releases)
- [Commits](linode/linode-cli@v5.55.0...v5.56.1)

---
updated-dependencies:
- dependency-name: linode-cli
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: linode-dependencies
...

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

.github/requirements.txt

@@ -1 +1 @@
-linode-cli==5.55.0
+linode-cli==5.56.1