Bump spring.core.version from 3.1.0.RELEASE to 5.2.7.RELEASE in /spring-security-tutorial#2

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dependabot/maven/spring-security-tutorial/spring.core.version-5.2.7.RELEASEkrams915/spring-security-tutorial:dependabot/maven/spring-security-tutorial/spring.core.version-5.2.7.RELEASECopy head branch name to clipboard