chore: regenerate README

[yoshi-automation]

This PR was generated using Autosynth. 🌈

Log from Synthtool

2021-05-14 02:38:42,008 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-redis/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working tree clean
2021-05-14 02:38:43,288 synthtool [DEBUG] > Wrote metadata to .github/readme/synth.metadata/synth.metadata.

Full log will be available here:
https://source.cloud.google.com/results/invocations/092695a0-52f4-49a7-b955-29402c307745/targets

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[yoshi-approver]

Rubber stamped PR!

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[codecov]

Codecov Report

Merging #412 (38db13a) into master (9b36898) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #412   +/-   ##
=========================================
  Coverage     79.98%   79.98%           
  Complexity      196      196           
=========================================
  Files            12       12           
  Lines          1609     1609           
  Branches         12       12           
=========================================
  Hits           1287     1287           
  Misses          302      302           
  Partials         20       20           

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