chore: regenerate README (#512)

This PR was generated using Autosynth. 🌈


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

```
2021-04-09 19:22:01,749 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-containeranalysis/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working tree clean
2021-04-09 19:22:03,120 synthtool [DEBUG] > Wrote metadata to .github/readme/synth.metadata/synth.metadata.

```
</details>

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https://source.cloud.google.com/results/invocations/344c2b46-6718-4557-8f44-8d9bd30aa9f1/targets

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Author: yoshi-automation

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

@@ -4,14 +4,14 @@
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+        "sha": "009a547af1317cd9c098042caeb95122c6c068ba"
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+        "sha": "1f5e6bc8dc8e3661ee550905fc070e55e1b6cea1"
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README.md

@@ -8,6 +8,9 @@ Java idiomatic client for [Cloud Container Analysis][product-docs].
 - [Product Documentation][product-docs]
 - [Client Library Documentation][javadocs]
 
+
+
+
 ## Quickstart
 
 If you are using Maven with [BOM][libraries-bom], add this to your pom.xml file