chore: regenerate README (#177)

This PR was generated using Autosynth. 🌈


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

```
2021-02-25 21:53:15,731 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-analytics-admin/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working tree clean
2021-02-25 21:53:17,231 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/1b4148ed-41cc-4d20-8ed5-5e0c56fdc63c/targets

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

Author: yoshi-automation

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

@@ -4,14 +4,14 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-analytics-admin.git",
-        "sha": "9cb7aee44f8f414c7c1c4df2f07f71983d918950"
+        "sha": "75db8701c1bb6b130e7f4399f71d13d84088c5f2"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "b259489b06b25f399768b74b8baa943991f38ea7"
+        "sha": "8c5628b86cfa8386de7b8fc1675e6b528b552d57"
       }
     }
   ]

README.md

@@ -20,18 +20,18 @@ If you are using Maven, add this to your pom.xml file:
 <dependency>
   <groupId>com.google.analytics</groupId>
   <artifactId>google-analytics-admin</artifactId>
-  <version>0.3.0</version>
+  <version>0.3.1</version>
 </dependency>
 ```
 
 If you are using Gradle without BOM, add this to your dependencies
 ```Groovy
-compile 'com.google.analytics:google-analytics-admin:0.3.0'
+compile 'com.google.analytics:google-analytics-admin:0.3.1'
 ```
 
 If you are using SBT, add this to your dependencies
 ```Scala
-libraryDependencies += "com.google.analytics" % "google-analytics-admin" % "0.3.0"
+libraryDependencies += "com.google.analytics" % "google-analytics-admin" % "0.3.1"
 ```
 
 ## Authentication