chore: regenerate README (#595)
chore: regenerate README (#595)

This PR was generated using Autosynth. :rainbow:


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

```
2021-08-10 07:37:42,470 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-recommender/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working tree clean
2021-08-10 07:37:43,728 synthtool [DEBUG] > Wrote metadata to .github/readme/synth.metadata/synth.metadata.

```
</details>

Full log will be available here:
https://source.cloud.google.com/results/invocations/3ab186bc-02f8-4cd3-ae36-8e7b8be5ac28/targets

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