chore: regenerate README

[yoshi-automation]

This PR was generated using Autosynth. 🌈

Log from Synthtool

2021-03-03 19:39:18,861 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-logging/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working tree clean
2021-03-03 19:39:19,746 synthtool [DEBUG] > Wrote metadata to .github/readme/synth.metadata/synth.metadata.

Full log will be available here:
https://source.cloud.google.com/results/invocations/84acd960-f990-4e3c-a180-928d12640ab4/targets

• To automatically regenerate this PR, check this box.

[yoshi-approver]

Rubber stamped PR!

[codecov]

Codecov Report

Merging #458 (a0d6092) into master (0d325e8) will decrease coverage by 0.13%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master     #458      +/-   ##
============================================
- Coverage     78.64%   78.51%   -0.14%     
+ Complexity      745      656      -89     
============================================
  Files            44       44              
  Lines          4248     4087     -161     
  Branches        258      275      +17     
============================================
- Hits           3341     3209     -132     
- Misses          691      700       +9     
+ Partials        216      178      -38     

Impacted Files	Coverage Δ	Complexity Δ
...ain/java/com/google/cloud/logging/LoggingImpl.java	87.87% <0.00%> (-2.38%)	79.00% <0.00%> (-16.00%)
.../logging/v2/stub/LoggingServiceV2StubSettings.java	73.33% <0.00%> (-1.78%)	16.00% <0.00%> (-1.00%)
...d/logging/v2/stub/ConfigServiceV2StubSettings.java	83.42% <0.00%> (-1.32%)	33.00% <0.00%> (-1.00%)
.../logging/v2/stub/MetricsServiceV2StubSettings.java	82.26% <0.00%> (-1.18%)	15.00% <0.00%> (-1.00%)
...loud/logging/v2/stub/GrpcLoggingServiceV2Stub.java	90.29% <0.00%> (-0.74%)	12.00% <0.00%> (-1.00%)
...loud/logging/v2/stub/GrpcMetricsServiceV2Stub.java	91.05% <0.00%> (-0.61%)	11.00% <0.00%> (-1.00%)
...cloud/logging/v2/stub/GrpcConfigServiceV2Stub.java	96.97% <0.00%> (-0.27%)	29.00% <0.00%> (-1.00%)
.../main/java/com/google/cloud/logging/Exclusion.java	85.88% <0.00%> (-0.17%)	21.00% <0.00%> (-4.00%)
...c/main/java/com/google/cloud/logging/SinkInfo.java	80.59% <0.00%> (-0.10%)	17.00% <0.00%> (-2.00%)
...ain/java/com/google/cloud/logging/HttpRequest.java	91.44% <0.00%> (-0.05%)	44.00% <0.00%> (-12.00%)
... and 7 more

---

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 0d325e8...3a54760. Read the comment docs.