[stubsabot] Bump ibm-db to 3.2.8

[github-actions[bot]]

Release: https://pypi.org/pypi/ibm-db/3.2.8 Homepage: http://pypi.python.org/pypi/ibm_db/ Repository: https://github.com/ibmdb/python-ibmdb Typeshed stubs: https://github.com/python/typeshed/tree/main/stubs/ibm-db Diff: https://github.com/ibmdb/python-ibmdb/compare/v3.2.6...v3.2.8

Stubsabot analysis of the diff between the two releases:

• Total lines of Python code added: 645.
• Total lines of Python code deleted: 89.

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[brianschubert]

I don't see any obvious public API changes in ibm_db.c, but I'll let someone more familiar with these stubs do the final look over and merge