chore: update version in readme and examples/pom.xml

PiperOrigin-RevId: 755949001

Author: sararob

README.md

@@ -20,7 +20,7 @@ If you're using Maven, add the following to your dependencies:
   <dependency>
     <groupId>com.google.genai</groupId>
     <artifactId>google-genai</artifactId>
-    <version>0.6.1</version>
+    <version>0.7.0</version>
   </dependency>
 </dependencies>
 ```

examples/pom.xml

@@ -12,7 +12,7 @@
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <maven.compiler.source>1.8</maven.compiler.source>
     <maven.compiler.target>1.8</maven.compiler.target>
-    <google-genai.version>0.7.0-SNAPSHOT</google-genai.version><!-- {x-version-update:google-genai:current} -->
+    <google-genai.version>0.8.0-SNAPSHOT</google-genai.version><!-- {x-version-update:google-genai:current} -->
   </properties>
 
   <dependencies>