chore: regenerate README versions (#179)

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Author: yoshi-automation

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>7.0.0</version>
+      <version>8.0.0</version>
       <type>pom</type>
       <scope>import</scope>
     </dependency>
@@ -41,7 +41,7 @@ If you are using Maven without BOM, add this to your dependencies:
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-recaptchaenterprise</artifactId>
-      <version>0.30.1</version>
+      <version>0.31.0</version>
     </dependency>
     <!-- [END recaptcha-enterprise_install_without_bom] -->
 
@@ -65,7 +65,7 @@ If you are using Maven without BOM, add this to your dependencies:
       <plugin>
         <groupId>org.codehaus.mojo</groupId>
         <artifactId>build-helper-maven-plugin</artifactId>
-        <version>3.1.0</version>
+        <version>3.2.0</version>
         <executions>
           <execution>
             <id>add-snippets-source</id>

synth.metadata

@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-recaptchaenterprise.git",
-        "sha": "fa76a08dd1cb5a350000dec8fe952a572da9bd6e"
+        "sha": "5249385e3ba93588ac95a577dfb280c00b9f4971"
       }
     },
     {