chore: regenerate README (#48)

This PR was generated using Autosynth. 🌈


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

```
2021-02-19 00:46:47,635 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-retail/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working tree clean
2021-02-19 00:46:49,197 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/ad307b9a-3559-4869-b5c8-3759ebef75f7/targets

- [ ] To automatically regenerate this PR, check this box.

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

@@ -4,14 +4,14 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-retail.git",
-        "sha": "d21a378edeb5b4ed5822aa9fc1d9af2cd71bcf33"
+        "sha": "ab562adb06047190a45de14951d29ffe00c347f7"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "2414b817065726eae0bc525346c7e874f969369d"
+        "sha": "90044020c2a89930852c6c6e1596e60f774c4b52"
       }
     }
   ]

README.md

@@ -20,7 +20,7 @@ If you are using Maven, add this to your pom.xml file:
 <dependency>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-retail</artifactId>
-  <version>0.1.0</version>
+  <version>0.1.1</version>
 </dependency>
 
 ```