[3.5] Fixed annotation for local_addr in TCPConnector.__init__ (#3732)

[asvetlov]

(cherry picked from commit db80171)

Co-authored-by: Mathieu Dugré [email protected]

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Checklist

• I think the code is well written
• Unit tests for the changes exist
• Documentation reflects the changes
• If you provide code modification, please add yourself to CONTRIBUTORS.txt
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