chore: regenerate README

[yoshi-automation]

This PR was generated using Autosynth. 🌈

Log from Synthtool

2020-11-02 09:14:24,778 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-tasks/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working directory clean
2020-11-02 09:14:25,697 synthtool [DEBUG] > Wrote metadata to .github/readme/synth.metadata/synth.metadata.

Full log will be available here:
https://source.cloud.google.com/results/invocations/a3b978c9-f5b9-4090-961a-948fe2cbf970/targets

• To automatically regenerate this PR, check this box.

[yoshi-approver]

Rubber stamped PR!

[codecov]

Codecov Report

Merging #291 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #291   +/-   ##
=========================================
  Coverage     76.23%   76.23%           
  Complexity      390      390           
=========================================
  Files            18       18           
  Lines          2845     2845           
  Branches         28       28           
=========================================
  Hits           2169     2169           
  Misses          588      588           
  Partials         88       88           

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