Updating samples to SpringBoot 2.6.6
<!-- don't deploy the samples, kind of pointless -->
<maven.deploy.skip>true</maven.deploy.skip>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
- <spring.boot.version>2.6.3</spring.boot.version>
+ <spring.boot.version>2.6.6</spring.boot.version>
<spring.cloud.eureka.version>3.1.1</spring.cloud.eureka.version>
<cxf.jetty9.version>9.4.45.v20220203</cxf.jetty9.version>
<cxf.netty.version>4.1.75.Final</cxf.netty.version>
