MNT: (deps): Bump numpy from 2.1.0 to 2.1.1 in /ci

Bumps [numpy](https://github.com/numpy/numpy) from 2.1.0 to 2.1.1.
- [Release notes](https://github.com/numpy/numpy/releases)
- [Changelog](https://github.com/numpy/numpy/blob/main/doc/RELEASE_WALKTHROUGH.rst)
- [Commits](numpy/numpy@v2.1.0...v2.1.1)

---
updated-dependencies:
- dependency-name: numpy
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

ci/requirements.txt

@@ -1,6 +1,6 @@
 python>=3.7
 matplotlib==3.9.2
-numpy==2.1.0
+numpy==2.1.1
 pandas==2.2.2
 netcdf4==1.7.1.post2
 erddapy==2.2.0