chore: regenerate README

[yoshi-automation]

This PR was generated using Autosynth. 🌈

Log from Synthtool

2020-11-10 17:36:33,580 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-pubsub/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working directory clean
2020-11-10 17:36:34,570 synthtool [DEBUG] > Wrote metadata to .github/readme/synth.metadata/synth.metadata.

Full log will be available here:
https://source.cloud.google.com/results/invocations/af9caac4-079c-4201-8a6e-b982f1f74497/targets

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[yoshi-approver]

Rubber stamped PR!

[codecov]

Codecov Report

Merging #428 (1288f57) into master (5e02cfc) will decrease coverage by 0.06%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master     #428      +/-   ##
============================================
- Coverage     79.27%   79.20%   -0.07%     
  Complexity      320      320              
============================================
  Files            21       21              
  Lines          2905     2905              
  Branches        159      159              
============================================
- Hits           2303     2301       -2     
- Misses          536      537       +1     
- Partials         66       67       +1     

Impacted Files	Coverage Δ	Complexity Δ
...ain/java/com/google/cloud/pubsub/v1/Publisher.java	87.13% <0.00%> (-0.49%)	47.00% <0.00%> (ø%)

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