chore: regenerate README

[yoshi-automation]

This PR was generated using Autosynth. 🌈

Log from Synthtool

2021-03-11 23:24:25,737 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-monitoring/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working tree clean
2021-03-11 23:24:26,624 synthtool [DEBUG] > Wrote metadata to .github/readme/synth.metadata/synth.metadata.

Full log will be available here:
https://source.cloud.google.com/results/invocations/8a0b7ed7-0f06-4779-ad5f-495226380b1e/targets

• To automatically regenerate this PR, check this box.

[yoshi-approver]

Rubber stamped PR!

[codecov]

Codecov Report

Merging #464 (38ada5a) into master (fd99295) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #464   +/-   ##
=========================================
  Coverage     78.04%   78.04%           
  Complexity      544      544           
=========================================
  Files            36       36           
  Lines          3616     3616           
  Branches         75       75           
=========================================
  Hits           2822     2822           
  Misses          701      701           
  Partials         93       93           

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