Update expected response text in get_solaranywhere test

[kandersolar]

• Closes #xxxx
• I am familiar with the contributing guidelines
• Tests added
• Updates entries in docs/sphinx/source/reference for API changes.
• Adds description and name entries in the appropriate "what's new" file in docs/sphinx/source/whatsnew for all changes. Includes link to the GitHub Issue with :issue:`num` or this Pull Request with :pull:`num`. Includes contributor name and/or GitHub username (link with :ghuser:`user`).
• New code is fully documented. Includes numpydoc compliant docstrings, examples, and comments where necessary.
• Pull request is nearly complete and ready for detailed review.
• Maintainer: Appropriate GitHub Labels (including remote-data) and Milestone are assigned to the Pull Request and linked Issue.

Looks like SolarAnywhere made slight adjustments to the error messages returned by their API. A test is failing with

FAILED tests/iotools/test_solaranywhere.py::test_get_solaranywhere_not_available - AssertionError: Regex pattern did not match.
 Regex: 'Tile is outside of our coverage'
 Input: 'Location is outside of our coverage area (Latitude = 40, Longitude = -70)'

Example CI failure: https://github.com/pvlib/pvlib-python/actions/runs/14497459980/job/40668716357