Bump spring-boot-starter-parent from 2.5.4 to 2.6.4#60

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dependabot/maven/org.springframework.boot-spring-boot-starter-parent-2.6.4hazelcast-guides/caching-springboot-jcache:dependabot/maven/org.springframework.boot-spring-boot-starter-parent-2.6.4Copy head branch name to clipboard