chore: regenerate README (#54)

This PR was generated using Autosynth. 🌈


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

```
2021-06-10 16:27:47,923 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-domains/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working tree clean
2021-06-10 16:27:49,137 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/fb6720c2-41ff-4797-a7cc-2708bbf0647d/targets

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

@@ -4,14 +4,14 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-domains.git",
-        "sha": "b64355127d89a1af66ee60285d842358972d8ba8"
+        "sha": "bdecc457973b89d6462de0f3ddee9e6cee909877"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "c3e41da0fa256ad7f6b4bc76b9d069dedecdfef4"
+        "sha": "5cae043787729a908ed0cab28ca27baf9acee3c4"
       }
     }
   ]

README.md

@@ -27,12 +27,12 @@ If you are using Maven, add this to your pom.xml file:
 
 If you are using Gradle without BOM, add this to your dependencies
 ```Groovy
-compile 'com.google.cloud:google-cloud-domains:0.2.0'
+compile 'com.google.cloud:google-cloud-domains:0.2.1'
 ```
 
 If you are using SBT, add this to your dependencies
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-domains" % "0.2.0"
+libraryDependencies += "com.google.cloud" % "google-cloud-domains" % "0.2.1"
 ```
 
 ## Authentication