chore: regenerate README

[yoshi-automation]

This PR was generated using Autosynth. 🌈

Log from Synthtool

2021-02-24 17:22:29,601 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-tasks/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working tree clean
2021-02-24 17:22:31,127 synthtool [DEBUG] > Wrote metadata to .github/readme/synth.metadata/synth.metadata.

Full log will be available here:
https://source.cloud.google.com/results/invocations/0bbfded4-eb62-478b-9627-42c51cc920c7/targets

• To automatically regenerate this PR, check this box.

[yoshi-approver]

Rubber stamped PR!

[codecov]

Codecov Report

Merging #367 (51aedc1) into master (13b383c) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #367   +/-   ##
=========================================
  Coverage     80.96%   80.96%           
  Complexity      455      455           
=========================================
  Files            18       18           
  Lines          2848     2848           
  Branches         28       28           
=========================================
  Hits           2306     2306           
  Misses          454      454           
  Partials         88       88           

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