chore: regenerate README (#270)

This PR was generated using Autosynth. 🌈


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

```
2021-02-26 01:21:06,719 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-recommendations-ai/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working tree clean
2021-02-26 01:21:08,373 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/514368af-3961-41b9-9358-8db8a740c81b/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-recommendations-ai.git",
-        "sha": "dd673a0dcb62d959fd94bf3a0420eae7cfb328b9"
+        "sha": "4f4ddef05641043bed88ca3a3e7d336f6f84caf0"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "0199c79b8324fba66476300824aa931788c47e2d"
+        "sha": "8c5628b86cfa8386de7b8fc1675e6b528b552d57"
       }
     }
   ]

README.md

@@ -20,19 +20,19 @@ If you are using Maven, add this to your pom.xml file:
 <dependency>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-recommendations-ai</artifactId>
-  <version>0.4.0</version>
+  <version>0.4.1</version>
 </dependency>
 
 ```
 
 If you are using Gradle without BOM, add this to your dependencies
 ```Groovy
-compile 'com.google.cloud:google-cloud-recommendations-ai:0.4.0'
+compile 'com.google.cloud:google-cloud-recommendations-ai:0.4.1'
 ```
 
 If you are using SBT, add this to your dependencies
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-recommendations-ai" % "0.4.0"
+libraryDependencies += "com.google.cloud" % "google-cloud-recommendations-ai" % "0.4.1"
 ```
 
 ## Authentication