bump pre-installed librdkafka version

[codecov[bot]]

Codecov Report

Merging #1134 (36c7bc6) into master (e000b76) will decrease coverage by 15.80%. The diff coverage is n/a.

@@             Coverage Diff             @@
##           master    #1134       +/-   ##
===========================================
- Coverage   67.87%   52.07%   -15.80%     
===========================================
  Files         119      112        -7     
  Lines        4709     4524      -185     
  Branches     1027      989       -38     
===========================================
- Hits         3196     2356      -840     
- Misses       1403     1974      +571     
- Partials      110      194       +84     

Flag	Coverage Δ
backend	52.07% <ø> (-15.80%)	:arrow_down:

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see 37 files with indirect coverage changes

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