Chore(deps): Bump cratedb-toolkit[testing] from 0.0.15 to 0.0.20

Bumps [cratedb-toolkit[testing]](https://github.com/crate/cratedb-toolkit) from 0.0.15 to 0.0.20.
- [Release notes](https://github.com/crate/cratedb-toolkit/releases)
- [Changelog](https://github.com/crate/cratedb-toolkit/blob/main/CHANGES.md)
- [Commits](crate/cratedb-toolkit@v0.0.15...v0.0.20)

---
updated-dependencies:
- dependency-name: cratedb-toolkit[testing]
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

pyproject.toml

@@ -139,7 +139,7 @@ optional-dependencies.test = [
   # Problem: Breaks with requests 2.32.0: Not supported URL scheme http+docker.
   # Solution: Pin `docker` and `requests` packages.
   # https://github.com/docker/docker-py/issues/3256#issuecomment-2126888985
-  "cratedb-toolkit[testing]==0.0.15",
+  "cratedb-toolkit[testing]==0.0.20",
   "docker<8",
   "localstack-utils<1.1",
   "pytest<9",