Bump ipython from 8.26.0 to 8.28.0

Bumps ipython from 8.26.0 to 8.28.0.

Commits

• a9c7369 release 8.28.0
• 0e62e65 What's new and update release tools (#14530)
• 9b8d0c3 What's new and update release tools
• 0d3a38c DOC: whatsnew/v8: Update release notes for the Mamba and Micromamba magic com...
• b912331 Update docs/source/whatsnew/version8.rst
• d23bee0 Use environment variable to identify conda / mamba (#14515)
• 06f266d Update docs/source/whatsnew/version8.rst
• e77bdfa remove json report files (#14529)
• ea2fce1 [PR]: Make values public (_tb_highlight & _tb_highlight_style) (#14518)
• ab2053a remove json report files
• Additional commits viewable in compare view