Bump gson from 2.8.2 to 2.8.9 in /social_network_backend#9

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dependabot/maven/social_network_backend/com.google.code.gson-gson-2.8.9cmucloudcourse/Project5:dependabot/maven/social_network_backend/com.google.code.gson-gson-2.8.9Copy head branch name to clipboard