chore(main): release 2.9.15 (#1228)

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>

Author: release-please[bot]

CHANGELOG.md

@@ -1,5 +1,12 @@
 # Changelog
 
+## [2.9.15](https://github.com/googleapis/java-spanner-jdbc/compare/v2.9.14...v2.9.15) (2023-05-15)
+
+
+### Dependencies
+
+* Update dependency com.google.cloud:google-cloud-shared-dependencies to v3.9.0 ([#1227](https://github.com/googleapis/java-spanner-jdbc/issues/1227)) ([329f258](https://github.com/googleapis/java-spanner-jdbc/commit/329f25862a0f7118cc0419568eca3a72a053a055))
+
 ## [2.9.14](https://github.com/googleapis/java-spanner-jdbc/compare/v2.9.13...v2.9.14) (2023-05-02)
 
 

pom.xml

@@ -4,7 +4,7 @@
   xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>
   <artifactId>google-cloud-spanner-jdbc</artifactId>
-  <version>2.9.15-SNAPSHOT</version><!-- {x-version-update:google-cloud-spanner-jdbc:current} -->
+  <version>2.9.15</version><!-- {x-version-update:google-cloud-spanner-jdbc:current} -->
   <packaging>jar</packaging>
   <name>Google Cloud Spanner JDBC</name>
   <url>https://github.com/googleapis/java-spanner-jdbc</url>

samples/install-without-bom/pom.xml

@@ -53,7 +53,7 @@
       <plugin>
         <groupId>org.codehaus.mojo</groupId>
         <artifactId>build-helper-maven-plugin</artifactId>
-        <version>3.4.0</version>
+        <version>3.3.0</version>
         <executions>
           <execution>
             <id>add-snippets-source</id>

samples/snapshot/pom.xml

@@ -28,7 +28,7 @@
     <dependency>
       <groupId>com.google.cloud</groupId>
       <artifactId>google-cloud-spanner-jdbc</artifactId>
-      <version>2.9.15-SNAPSHOT</version>
+      <version>2.9.15</version>
     </dependency>
     <!-- {x-version-update-end} -->
 
@@ -52,7 +52,7 @@
       <plugin>
         <groupId>org.codehaus.mojo</groupId>
         <artifactId>build-helper-maven-plugin</artifactId>
-        <version>3.4.0</version>
+        <version>3.3.0</version>
         <executions>
           <execution>
             <id>add-snippets-source</id>

versions.txt

@@ -1,4 +1,4 @@
 # Format:
 # module:released-version:current-version
 
-google-cloud-spanner-jdbc:2.9.14:2.9.15-SNAPSHOT
+google-cloud-spanner-jdbc:2.9.15:2.9.15