chore: regenerate README (#459)

This PR was generated using Autosynth. 🌈


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

```
2021-03-03 19:44:44,664 synthtool [DEBUG] > Executing /root/.cache/synthtool/java-errorreporting/.github/readme/synth.py.
On branch autosynth-readme
nothing to commit, working tree clean
2021-03-03 19:44:45,522 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/9cee6280-c91f-4e02-9a3d-dd13ab9b3da0/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-errorreporting.git",
-        "sha": "44d553634e0f15341a5bc5610988ebe31b1a4dba"
+        "sha": "c6af164ad857a2e70f03a49999dab5ea2516d72b"
       }
     },
     {
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "8c5628b86cfa8386de7b8fc1675e6b528b552d57"
+        "sha": "2e7bd5cc66a3f0b90ce1c150eb35c89eeb9872d6"
       }
     }
   ]

README.md

@@ -20,7 +20,7 @@ If you are using Maven with [BOM][libraries-bom], add this to your pom.xml file
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>libraries-bom</artifactId>
-      <version>18.0.0</version>
+      <version>18.1.0</version>
       <type>pom</type>
       <scope>import</scope>
     </dependency>
@@ -60,25 +60,25 @@ If you are using Maven without BOM, add this to your dependencies:
 <dependency>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-errorreporting</artifactId>
-  <version>0.120.33-beta</version>
+  <version>0.120.34-beta</version>
 </dependency>
 
 ```
 
 If you are using Gradle 5.x or later, add this to your dependencies
 ```Groovy
-implementation platform('com.google.cloud:libraries-bom:18.0.0')
+implementation platform('com.google.cloud:libraries-bom:18.1.0')
 
 compile 'com.google.cloud:google-cloud-errorreporting'
 ```
 If you are using Gradle without BOM, add this to your dependencies
 ```Groovy
-compile 'com.google.cloud:google-cloud-errorreporting:0.120.33-beta'
+compile 'com.google.cloud:google-cloud-errorreporting:0.120.34-beta'
 ```
 
 If you are using SBT, add this to your dependencies
 ```Scala
-libraryDependencies += "com.google.cloud" % "google-cloud-errorreporting" % "0.120.33-beta"
+libraryDependencies += "com.google.cloud" % "google-cloud-errorreporting" % "0.120.34-beta"
 ```
 
 ## Authentication