Updating Spring Boot in samples to 2.3.6.RELEASE
<!-- 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>2.3.5.RELEASE</spring.boot.version>
+ <spring.boot.version>2.3.6.RELEASE</spring.boot.version>
<spring.cloud.eureka.version>2.2.3.RELEASE</spring.cloud.eureka.version>
<cxf.jetty9.version>9.4.34.v20201102</cxf.jetty9.version>
<cxf.httpcomponents.client.version>4.5.13</cxf.httpcomponents.client.version>
