chore: regenerate README (#286)

This PR was generated using Autosynth. 🌈 Synth log will be available here: https://source.cloud.google.com/results/invocations/82a0afa3-6ece-4dc0-8f66-40c2ce25f020/targets - [ ] To automatically regenerate this PR, check this box.

Author: yoshi-automation

README.md

@@ -17,7 +17,7 @@ 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>9.1.0</version>
+ <version>10.1.0</version>
  <type>pom</type>
  <scope>import</scope>
  </dependency>
@@ -38,7 +38,7 @@ If you are using Maven without BOM, add this to your dependencies:
 <dependency>
  <groupId>com.google.cloud</groupId>
  <artifactId>google-cloud-dialogflow</artifactId>
- <version>2.1.0</version>
+ <version>2.2.0</version>
 </dependency>
 
 ```

synth.metadata

@@ -4,7 +4,7 @@
  "git": {
  "name": ".",
  "remote": "https://github.com/googleapis/java-dialogflow.git",
- "sha": "a8f64abd553dc8adceac9243931ef5f7cb72f35e"
+ "sha": "8d884ffbde742077631a95963b8fa85c2b8e8607"
  }
  },
  {