Update dependency exceptiongroup to v1.2.1

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
exceptiongroup (changelog)	==1.2.0 -> ==1.2.1

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Release Notes

agronholm/exceptiongroup (exceptiongroup)

v1.2.1

Compare Source

• Updated the copying of __notes__ to match CPython behavior (PR by CF Bolz-Tereick)
• Corrected the type annotation of the exception handler callback to accept a BaseExceptionGroup instead of BaseException
• Fixed type errors on Python < 3.10 and the type annotation of suppress() (PR by John Litborn)

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