change in version

Author: asthamohta

README.md

@@ -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-spanner</artifactId>
-  <version>6.21.2</version>
+  <version>6.23.2</version>
 </dependency>
 
 ```

samples/install-without-bom/pom.xml

@@ -32,7 +32,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-spanner</artifactId>
-      <version>6.21.2</version>
+      <version>6.23.2</version>
     </dependency>
     <!-- [END spanner_install_without_bom] -->