Bump spring-boot-starter-parent from 2.5.4 to 2.6.3 in /mock-server#28

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dependabot/maven/mock-server/org.springframework.boot-spring-boot-starter-parent-2.6.3sarbesh/mock-server:dependabot/maven/mock-server/org.springframework.boot-spring-boot-starter-parent-2.6.3Copy head branch name to clipboard