MNT: (deps): Bump bottleneck from 1.3.7 to 1.3.8 in /ci

Bumps [bottleneck](https://github.com/pydata/bottleneck) from 1.3.7 to 1.3.8.
- [Release notes](https://github.com/pydata/bottleneck/releases)
- [Changelog](https://github.com/pydata/bottleneck/blob/master/RELEASE.rst)
- [Commits](pydata/bottleneck@v1.3.7...v1.3.8)

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

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

ci/requirements.txt

@@ -8,5 +8,5 @@ cftime==1.6.3
 erddapy==2.2.0
 ctd==1.4.5 #python-ctd
 seawater==3.3.4
-bottleneck==1.3.7
+bottleneck==1.3.8
 #geomag cmweis github version... part of package