deps: update spring.version to v2.5.1 (#544)

Author: renovate-bot

samples/spring-framework/pom.xml

@@ -19,7 +19,7 @@ limitations under the License.
  <properties>
  <maven.compiler.target>1.8</maven.compiler.target>
  <maven.compiler.source>1.8</maven.compiler.source>
- <spring.version>2.5.0</spring.version>
+ <spring.version>2.5.1</spring.version>
  </properties>
 
  <!--