Merge pull request #3953 from Unidata/dependabot-pip-ci-boto3-1.42.0

CI: (deps): Bump boto3 from 1.40.1 to 1.42.0 in /ci

Author: unidata-pr-helper[bot]

ci/extra_requirements.txt

@@ -2,4 +2,4 @@ cartopy==0.24.0
 dask==2025.11.0
 netCDF4==1.7.3
 shapely==2.1.2
-boto3==1.40.1
+boto3==1.42.0