chore: regenerate README

[yoshi-automation]

This PR was generated using Autosynth. 🌈

Log from Synthtool

2020-10-15 22:53:24,342 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-asset/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working directory clean
2020-10-15 22:53:25,356 synthtool [DEBUG] > Wrote metadata to .github/readme/synth.metadata/synth.metadata.

Full log will be available here:
https://source.cloud.google.com/results/invocations/51589538-5e74-4392-a2df-9aeb904e425a/targets

• To automatically regenerate this PR, check this box.

[codecov]

Codecov Report

Merging #401 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #401   +/-   ##
=========================================
  Coverage     72.95%   72.95%           
  Complexity      266      266           
=========================================
  Files            36       36           
  Lines          2063     2063           
  Branches         11       11           
=========================================
  Hits           1505     1505           
  Misses          539      539           
  Partials         19       19           

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[yoshi-approver]

Rubber stamped PR!