chore: regenerate README (#40)

This PR was generated using Autosynth. 🌈


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

```
2021-02-10 17:30:31,862 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-retail/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working tree clean
2021-02-10 17:30:32,768 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/6457887d-0439-476a-9804-e768fe1acce2/targets

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

@@ -4,14 +4,14 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-retail.git",
-        "sha": "da83763c7643cb41fa697adb5184a536ce499144"
+        "sha": "d21a378edeb5b4ed5822aa9fc1d9af2cd71bcf33"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "40d76d547573fc273220bc0c8291fd942cb4502b"
+        "sha": "2414b817065726eae0bc525346c7e874f969369d"
       }
     }
   ]

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-retail:0.1.0'
+compile 'com.google.cloud:google-cloud-retail:0.1.1'
 ```
 
 If you are using SBT, add this to your dependencies
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-retail" % "0.1.0"
+libraryDependencies += "com.google.cloud" % "google-cloud-retail" % "0.1.1"
 ```
 
 ## Authentication