fix(deps): update dependency com.posthog:posthog-android to v3.15.0 (#4723)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

gradle/libs.versions.toml

@@ -190,7 +190,7 @@ opusencoder = "io.element.android:opusencoder:1.1.0"
 zxing_cpp = "io.github.zxing-cpp:android:2.3.0"
 
 # Analytics
-posthog = "com.posthog:posthog-android:3.14.1"
+posthog = "com.posthog:posthog-android:3.15.0"
 sentry = "io.sentry:sentry-android:8.12.0"
 # main branch can be tested replacing the version with main-SNAPSHOT
 matrix_analytics_events = "com.github.matrix-org:matrix-analytics-events:0.28.0"