chore(deps): update dependency com.google.cloud:google-cloud-retail t…

…o v2.3.0 (#502)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [com.google.cloud:google-cloud-retail](https://github.com/googleapis/java-) | `2.2.1` -> `2.3.0` | [![age](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-retail/2.3.0/age-slim)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-retail/2.3.0/adoption-slim)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-retail/2.3.0/compatibility-slim/2.2.1)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://badges.renovateapi.com/packages/maven/com.google.cloud:google-cloud-retail/2.3.0/confidence-slim/2.2.1)](https://docs.renovatebot.com/merge-confidence/) |

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README.md

@@ -19,7 +19,7 @@ If you are using Maven, add this to your pom.xml file:
 <dependency>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-retail</artifactId>
-  <version>2.2.1</version>
+  <version>2.3.0</version>
 </dependency>
 
 ```

samples/install-without-bom/pom.xml

@@ -29,7 +29,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-retail</artifactId>
-      <version>2.2.1</version>
+      <version>2.3.0</version>
     </dependency>
     <!-- [END retail_install_without_bom] -->
 

samples/interactive-tutorials/pom.xml

@@ -41,7 +41,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-retail</artifactId>
-      <version>2.2.1</version>
+      <version>2.3.0</version>
     </dependency>
     <dependency>
       <groupId>junit</groupId>

samples/snippets/pom.xml

@@ -28,7 +28,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-retail</artifactId>
-      <version>2.2.1</version>
+      <version>2.3.0</version>
     </dependency>
 
     <dependency>