Update pandas requirement from ~=1.4.0 to ~=2.2.1 in /docs

[dependabot[bot]]

Updates the requirements on pandas to permit the latest version.

Release notes

Sourced from pandas's releases.

Pandas 2.2.1

We are pleased to announce the release of pandas 2.2.1. This release includes some new features, bug fixes, and performance improvements. We recommend that all users upgrade to this version.

See the full whatsnew for a list of all the changes. Pandas 2.2.1 supports Python 3.9 and higher.

The release will be available on the defaults and conda-forge channels:

conda install pandas

Or via PyPI:

python3 -m pip install --upgrade pandas

Please report any issues with the release on the pandas issue tracker.

Thanks to all the contributors who made this release possible.

Commits

• bdc79c1 RLS: 2.2.1
• 470b886 Backport PR #57582 on branch 2.2.x (DOC: Add contributors for 2.2.1) (#57583)
• 541448e RLS: 2.2.1
• bdbb179 Backport PR #57576 on branch 2.2.x (DOC: Add release date for 2.2.1) (#57579)
• 5521dc9 Backport PR #57314 on branch 2.2.x (BUG: Fix near-minimum timestamp handling)...
• ea56e0c Backport PR #57556 on branch 2.2.x (Remove PyArrow deprecation warning) (#57568)
• 3bfedfe Backport PR #57551: BLD: Add pyarrow extra for pip installation (#57557)
• 3a4033c Backport PR #57439 on branch 2.2.x (BUG: read_json returning Index instead of...
• c101d30 Backport PR #57510 on branch 2.2.x (DOC: Fix xarray example) (#57538)
• 0b49cf3 Backport PR #57536 on branch 2.2.x (BUG: dt64 + DateOffset with milliseconds)...
• Additional commits viewable in compare view

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