CI: (deps): Bump pooch from 1.8.2 to 1.9.0 in /ci

Bumps [pooch](https://github.com/fatiando/pooch) from 1.8.2 to 1.9.0.
- [Release notes](https://github.com/fatiando/pooch/releases)
- [Changelog](https://github.com/fatiando/pooch/blob/main/doc/changes.rst)
- [Commits](fatiando/pooch@v1.8.2...v1.9.0)

---
updated-dependencies:
- dependency-name: pooch
  dependency-version: 1.9.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

ci/requirements.txt

@@ -1,7 +1,7 @@
 matplotlib==3.10.8
 numpy==2.4.1
 pandas==2.3.3
-pooch==1.8.2
+pooch==1.9.0
 pint==0.25.2
 pyproj==3.7.2
 scipy==1.17.0