fix asynic/client.py's import

[wwqgtxx]

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Description of change

redis.asyncio.Redis's Lock and Retry should be from redis.asyncio

[codecov-commenter]

Codecov Report

Merging #2079 (eb656ca) into master (876cafc) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #2079   +/-   ##
=======================================
  Coverage   91.23%   91.23%           
=======================================
  Files         100      100           
  Lines       21361    21361           
=======================================
  Hits        19489    19489           
  Misses       1872     1872           

Impacted Files	Coverage Δ
redis/asyncio/client.py	90.63% <100.00%> (ø)
tests/test_cluster.py	97.42% <0.00%> (-0.13%)	⬇️
redis/asyncio/connection.py	82.75% <0.00%> (ø)
tests/conftest.py	87.20% <0.00%> (+0.79%)	⬆️

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[dvora-h]

@wwqgtxx Nice catch! Thanks for this!