Merge pull request Unidata#3896 from Unidata/dependabot-pip-ci-boto3-1.40.1

CI: (deps): Bump boto3 from 1.39.3 to 1.40.1 in /ci

Author: unidata-pr-helper[bot]

ci/extra_requirements.txt

@@ -2,4 +2,4 @@ cartopy==0.24.0
 dask==2025.7.0
 netCDF4==1.7.2
 shapely==2.1.1
-boto3==1.39.3
+boto3==1.40.1