chore: regenerate firebaseapphosting client (googleapis#29571)

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-firebaseapphosting/v1beta/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-firebaseapphosting</artifactId>
-      <version>v1beta-rev20250904-2.0.0</version>
+      <version>v1beta-rev20250918-2.0.0</version>
     </dependency>
   </dependencies>
 </project>
@@ -35,7 +35,7 @@ repositories {
   mavenCentral()
 }
 dependencies {
-  implementation 'com.google.apis:google-api-services-firebaseapphosting:v1beta-rev20250904-2.0.0'
+  implementation 'com.google.apis:google-api-services-firebaseapphosting:v1beta-rev20250918-2.0.0'
 }
 ```
 

clients/google-api-services-firebaseapphosting/v1beta/2.0.0/com/google/api/services/firebaseapphosting/v1beta/model/Backend.java

@@ -120,6 +120,13 @@ public final class Backend extends com.google.api.client.json.GenericJson {
   @com.google.api.client.util.Key
   private java.lang.String name;
 
+  /**
+   * Optional. Override environment variables for this Backend.
+   * The value may be {@code null}.
+   */
+  @com.google.api.client.util.Key
+  private java.util.List<EnvironmentVariable> overrideEnv;
+
   /**
    * Output only. A field that, if true, indicates that the system is working to make adjustments to
    * the backend during a LRO.
@@ -390,6 +397,23 @@ public Backend setName(java.lang.String name) {
     return this;
   }
 
+  /**
+   * Optional. Override environment variables for this Backend.
+   * @return value or {@code null} for none
+   */
+  public java.util.List<EnvironmentVariable> getOverrideEnv() {
+    return overrideEnv;
+  }
+
+  /**
+   * Optional. Override environment variables for this Backend.
+   * @param overrideEnv overrideEnv or {@code null} for none
+   */
+  public Backend setOverrideEnv(java.util.List<EnvironmentVariable> overrideEnv) {
+    this.overrideEnv = overrideEnv;
+    return this;
+  }
+
   /**
    * Output only. A field that, if true, indicates that the system is working to make adjustments to
    * the backend during a LRO.

clients/google-api-services-firebaseapphosting/v1beta/2.0.0/pom.xml

@@ -8,8 +8,8 @@
 
   <groupId>com.google.apis</groupId>
   <artifactId>google-api-services-firebaseapphosting</artifactId>
-  <version>v1beta-rev20250904-2.0.0</version>
-  <name>Firebase App Hosting API v1beta-rev20250904-2.0.0</name>
+  <version>v1beta-rev20250918-2.0.0</version>
+  <name>Firebase App Hosting API v1beta-rev20250918-2.0.0</name>
   <packaging>jar</packaging>
 
   <inceptionYear>2011</inceptionYear>

clients/google-api-services-firebaseapphosting/v1beta/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-firebaseapphosting</artifactId>
-      <version>v1beta-rev20250904-2.0.0</version>
+      <version>v1beta-rev20250918-2.0.0</version>
     </dependency>
   </dependencies>
 </project>
@@ -35,7 +35,7 @@ repositories {
   mavenCentral()
 }
 dependencies {
-  implementation 'com.google.apis:google-api-services-firebaseapphosting:v1beta-rev20250904-2.0.0'
+  implementation 'com.google.apis:google-api-services-firebaseapphosting:v1beta-rev20250918-2.0.0'
 }
 ```