chore: regenerate README (#51)

This PR was generated using Autosynth. 🌈


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

```
2020-11-09 17:44:19,922 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-aiplatform/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working directory clean
2020-11-09 17:44:21,005 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/9c81be6b-3d0d-4403-8a8d-c8864f8a737a/targets

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.github/readme/synth.metadata/synth.metadata

@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-aiplatform.git",
-        "sha": "e44abbc5a6c71b0290d83874ee583da3db0573a5"
+        "sha": "99d52a7ce86d81725ad3b2335e2031be942b0d67"
       }
     },
     {