Update debugpy requirement from >=1.8.20 to >=1.8.21 in /.dev in the python group

[dependabot]

Updates the requirements on debugpy to permit the latest version.
Updates debugpy to 1.8.21

Release notes

Sourced from debugpy's releases.

debugpy v1.8.21

Fixes for:

• Return evaluate result in DAP response body instead of writing to stdout: #2027
• Prevent invalid scopes request from crashing debug session: #2026
• Skip uninitialized __slots__ in variable resolver: #2024
• Handle -c arguments that are bytes instead of str: #2021
• Fix evaluation of variables from chained exception frames: #2018
• ContinueRequest with a specific threadId no longer resumes all threads (in-process adapter): #2012
• Avoid strong reference to exceptions during unwind: #2008
• Show error message on evaluate failures in the hover context: #2006
• Display dlerror output when dlopen fails: #2000
• Replace removed pkgutil.get_loader with importlib.util.find_spec in get_fullname: #1998

Enhancements:

• Add option to ignore all system exit codes: #2017
• Pull changes from pydevd up to March 2026: #2010

Infrastructure work:

• Suppress Flawfinder false positives on Cython memcpy / read-loop iterators (TSA #2816216, #2816217, #2816218, #2816219, #2816220): #2028, #2029, #2030, #2031, #2032

Thanks to @​maxbachmann, @​mfussenegger, and @​sambrightman for the commits.

Commits

• 858b05c Fix TSA #2816217: suppress Flawfinder false positive on Cython JoinPyUnicode ...
• f0c34f1 Fix TSA #2816216: suppress Flawfinder false positive on Cython DIGIT_PAIRS_8 ...
• 4c70e13 Fix TSA #2816218: suppress Flawfinder false positive on Cython read-loop iter...
• 19c2b8c Fix TSA #2816220: suppress Flawfinder false positive on Cython read-loop iter...
• ab92638 Merge pull request #2031 from StellaHuang95/stellahuang/tsa-2816219-flawfinde...
• 12bd4fe Return evaluate result in DAP response body instead of writing to stdout (#2027)
• 8bd57a7 Prevent invalid scopes request from crashing debug session (#2026)
• bf118c8 Skip uninitialized slots in variable resolver (#2024)
• a55be0e Potential fix when -c arguments are bytes instead of a str (#2021)
• 0f037ad Fix evaluation of variables from chained exception frames (#2018)
• Additional commits viewable in compare view

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.34%. Comparing base (81af5c8) to head (2fdfc57).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #738   +/-   ##
=======================================
  Coverage   84.34%   84.34%           
=======================================
  Files          26       26           
  Lines         805      805           
=======================================
  Hits          679      679           
  Misses        126      126           

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