chore: regenerate README

[yoshi-automation]

This PR was generated using Autosynth. 🌈

Log from Synthtool

2021-03-01 22:50:25,676 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-storage/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working tree clean
2021-03-01 22:50:27,290 synthtool [DEBUG] > Wrote metadata to .github/readme/synth.metadata/synth.metadata.

Full log will be available here:
https://source.cloud.google.com/results/invocations/b113d58b-e1bb-455d-8a89-e4841beacde4/targets

• To automatically regenerate this PR, check this box.

[yoshi-approver]

Rubber stamped PR!

[codecov]

Codecov Report

Merging #736 (e9b9dab) into master (c104a73) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #736   +/-   ##
=========================================
  Coverage     64.60%   64.60%           
  Complexity      625      625           
=========================================
  Files            32       32           
  Lines          5311     5311           
  Branches        520      520           
=========================================
  Hits           3431     3431           
  Misses         1718     1718           
  Partials        162      162           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update c104a73...7a1f8fb. Read the comment docs.