chore: regenerate README (#80)
chore: regenerate README (#80)

This PR was generated using Autosynth. :rainbow:


<details><summary>Log from Synthtool</summary>

```
2021-07-27 21:24:55,165 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-api-gateway/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working tree clean
2021-07-27 21:24:56,358 synthtool [DEBUG] > Wrote metadata to .github/readme/synth.metadata/synth.metadata.

```
</details>

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https://source.cloud.google.com/results/invocations/6707f9ee-dfcf-4650-a67f-91285c0f336c/targets

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