Update dependency com.kakao.sdk:v2-user to v2.21.7

Author: renovate[bot]

gradle/libs.versions.toml

@@ -75,7 +75,7 @@ sentry-android = "8.17.0"
 process-pheonix = "3.0.0"
 constraintlayout = "2.2.1"
 dot-indicator = "5.1.0"
-kakao = "2.21.4"
+kakao = "2.21.7"
 splash-screen = "1.0.1"
 javax-inject = "1"
 spotless = "7.1.0"