chore: regenerate README

[yoshi-automation]

This PR was generated using Autosynth. 🌈

Log from Synthtool

2021-05-11 01:29:43,245 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-securitycenter/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working tree clean
2021-05-11 01:29:44,584 synthtool [DEBUG] > Wrote metadata to .github/readme/synth.metadata/synth.metadata.

Full log will be available here:
https://source.cloud.google.com/results/invocations/ff5c79a0-610f-4df2-83d9-df490a191a7f/targets

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[codecov]

Codecov Report

Merging #488 (f21bd51) into master (31f05a4) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #488   +/-   ##
=========================================
  Coverage     83.63%   83.63%           
  Complexity      548      548           
=========================================
  Files            18       18           
  Lines          4081     4081           
  Branches         62       62           
=========================================
  Hits           3413     3413           
  Misses          598      598           
  Partials         70       70           

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[yoshi-approver]

Rubber stamped PR!