Add missing types to **kw

Add missing types to **kw

Simple change to fix (some) type checking with Pyright and friends.

Add missing types to **kw

Simple update to types, consistent with other similar instances already in place.

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This pull request is:  somewhere between the first and second options.  I don't think it merits an issue or test coverage.

- [ ] A documentation / typographical error fix
	- Good to go, no issue or tests are needed
- [ ] A short code fix
	- please include the issue number, and create an issue if none exists, which
	  must include a complete example of the issue.  one line code fixes without an
	  issue and demonstration will not be accepted.
	- Please include: `Fixes: #<issue number>` in the commit message
	- please include tests.   one line code fixes without tests will not be accepted.
- [ ] A new feature implementation
	- please include the issue number, and create an issue if none exists, which must
	  include a complete example of how the feature would look.
	- Please include: `Fixes: #<issue number>` in the commit message
	- please include tests.

**Have a nice day!**

Closes: #1073
Pull-request: https://github.com/sqlalchemy/alembic/pull/1073
Pull-request-sha: 34f0e38e7193a65b659e8af7fff553427048f536

Change-Id: I5f84478e59a74d3d841ff32a0c536e5b32cc9b21