chore: regenerate gmail client (googleapis#28085)

Generated in GitHub action: https://togithub.com/googleapis/googleapis/google-api-java-client-services/actions/workflows/codegen.yaml

Author: yoshi-code-bot

clients/google-api-services-gmail/v1/2.0.0/README.md

@@ -22,7 +22,7 @@ Add the following lines to your `pom.xml` file:
     <dependency>
       <groupId>com.google.apis</groupId>
       <artifactId>google-api-services-gmail</artifactId>
-      <version>v1-rev20250616-2.0.0</version>
+      <version>v1-rev20250630-2.0.0</version>
     </dependency>
   </dependencies>
 </project>
@@ -35,7 +35,7 @@ repositories {
   mavenCentral()
 }
 dependencies {
-  implementation 'com.google.apis:google-api-services-gmail:v1-rev20250616-2.0.0'
+  implementation 'com.google.apis:google-api-services-gmail:v1-rev20250630-2.0.0'
 }
 ```
 

clients/google-api-services-gmail/v1/2.0.0/com/google/api/services/gmail/Gmail.java

@@ -4056,7 +4056,8 @@ public Insert set(String parameterName, Object value) {
         }
       }
       /**
-       * Lists the messages in the user's mailbox.
+       * Lists the messages in the user's mailbox. For example usage, see [List Gmail
+       * messages](https://developers.google.com/workspace/gmail/api/guides/list-messages).
        *
        * Create a request for the method "messages.list".
        *
@@ -4078,7 +4079,8 @@ public class List extends GmailRequest<com.google.api.services.gmail.model.ListM
         private static final String REST_PATH = "gmail/v1/users/{userId}/messages";
 
         /**
-         * Lists the messages in the user's mailbox.
+         * Lists the messages in the user's mailbox. For example usage, see [List Gmail
+         * messages](https://developers.google.com/workspace/gmail/api/guides/list-messages).
          *
          * Create a request for the method "messages.list".
          *

clients/google-api-services-gmail/v1/2.0.0/pom.xml

@@ -8,8 +8,8 @@
 
   <groupId>com.google.apis</groupId>
   <artifactId>google-api-services-gmail</artifactId>
-  <version>v1-rev20250616-2.0.0</version>
-  <name>Gmail API v1-rev20250616-2.0.0</name>
+  <version>v1-rev20250630-2.0.0</version>
+  <name>Gmail API v1-rev20250630-2.0.0</name>
   <packaging>jar</packaging>
 
   <inceptionYear>2011</inceptionYear>

clients/google-api-services-gmail/v1/README.md

@@ -22,7 +22,7 @@ Add the following lines to your `pom.xml` file:
     <dependency>
       <groupId>com.google.apis</groupId>
       <artifactId>google-api-services-gmail</artifactId>
-      <version>v1-rev20250616-2.0.0</version>
+      <version>v1-rev20250630-2.0.0</version>
     </dependency>
   </dependencies>
 </project>
@@ -35,7 +35,7 @@ repositories {
   mavenCentral()
 }
 dependencies {
-  implementation 'com.google.apis:google-api-services-gmail:v1-rev20250616-2.0.0'
+  implementation 'com.google.apis:google-api-services-gmail:v1-rev20250630-2.0.0'
 }
 ```