chore: regenerate README (#37)

This PR was generated using Autosynth. 🌈


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

```
2021-06-07 22:37:21,201 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-essential-contacts/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working tree clean
2021-06-07 22:37:22,409 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/02bfa151-f791-4d5d-8007-0bc4ef56da29/targets

- [ ] To automatically regenerate this PR, check this box. (May take up to 24 hours.)

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

@@ -4,14 +4,14 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-essential-contacts.git",
-        "sha": "4012c1e0e51d39107c1b19905a45ce709db242f9"
+        "sha": "583554c2f167aed5a4115f1132db242078f7a7fe"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "c3e41da0fa256ad7f6b4bc76b9d069dedecdfef4"
+        "sha": "2430f8d90ed8a508e8422a3a7191e656d5a6bf53"
       }
     }
   ]

README.md

@@ -17,18 +17,18 @@ If you are using Maven, add this to your pom.xml file:
 <dependency>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-essential-contacts</artifactId>
-  <version>0.1.1</version>
+  <version>0.1.2</version>
 </dependency>
 ```
 
 If you are using Gradle without BOM, add this to your dependencies
 ```Groovy
-compile 'com.google.cloud:google-cloud-essential-contacts:0.1.1'
+compile 'com.google.cloud:google-cloud-essential-contacts:0.1.2'
 ```
 
 If you are using SBT, add this to your dependencies
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-essential-contacts" % "0.1.1"
+libraryDependencies += "com.google.cloud" % "google-cloud-essential-contacts" % "0.1.2"
 ```
 
 ## Authentication