chore: regenerate README (#614)

This PR was generated using Autosynth. 🌈


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

```
2021-08-19 17:31:07,599 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-datacatalog/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working tree clean
2021-08-19 17:31:08,837 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/2db7af7b-760b-408c-9d8a-564fe100d3ea/targets

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

@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-datacatalog.git",
-        "sha": "c5b19df8fb550d8a4ad0faa001fd60f2bd6daf2b"
+        "sha": "5a4b714e40d41caae72917095c9fe811d66508a1"
       }
     },
     {

README.md

@@ -41,7 +41,7 @@ If you are using Maven without BOM, add this to your dependencies:
 <dependency>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-datacatalog</artifactId>
-  <version>1.5.0</version>
+  <version>1.5.2</version>
 </dependency>
 
 ```