Update xarray requirement from <2024.7.0 to <2024.8.0 in /.github/dependabot

[dependabot[bot]]

Updates the requirements on xarray to permit the latest version.

Changelog

Sourced from xarray's changelog.

How to issue an xarray release in 16 easy steps

Time required: about an hour.

These instructions assume that upstream refers to the main repository:

$ git remote -v
{...}
upstream        https://github.com/pydata/xarray (fetch)
upstream        https://github.com/pydata/xarray (push)

1. Ensure your main branch is synced to upstream:

   git switch main
   git pull upstream main
   

2. Add a list of contributors. First fetch all previous release tags so we can see the version number of the last release was:

   git fetch upstream --tags
   

   Then run

   python ci/release_contributors.py
   

   (needs gitpython and toolz / cytoolz)

   and copy the output.

3. Write a release summary: ~50 words describing the high level features. This will be used in the release emails, tweets, GitHub release notes, etc.

4. Look over whats-new.rst and the docs. Make sure "What's New" is complete (check the date!) and add the release summary at the top. Things to watch out for:

   • Important new features should be highlighted towards the top.
   • Function/method references should include links to the API docs.
   • Sometimes notes get added in the wrong section of whats-new, typically due to a bad merge. Check for these before a release by using git diff, e.g., git diff v{YYYY.MM.X-1} whats-new.rst where {YYYY.MM.X-1} is the previous release.

5. Open a PR with the release summary and whatsnew changes; in particular the release headline should get feedback from the team on what's important to include.

6. After merging, again ensure your main branch is synced to upstream:

   git pull upstream main
   

7. If you have any doubts, run the full test suite one final time!

... (truncated)

Commits

• acab647 release notes for 2024.07.0 (#9287)
• ea23dd9 Allow importing from xarray.groupers (#9289)
• 470d1e8 automate extracting the contributors (#9288)
• af12604 Support rechunking to a frequency. (#9109)
• 53c5634 Fully deprecate squeeze kwarg to groupby (#9280)
• 0023e5d Change .groupby fastpath to work for monotonic increasing and decreasing (#7427)
• d0048ef Adding open_datatree backend-specific keyword arguments (#9199)
• ad35a10 [pre-commit.ci] pre-commit autoupdate (#9202)
• 45d25b9 Restore ability to specify _FillValue as Python native integers (#9258)
• 95e67b6 add backend intro and how-to diagram (#9175)
• Additional commits viewable in compare view

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