Update dependency com.sigpwned:emoji4j-core to v15.1.2 (#3396)

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

gradle/libs.versions.toml

@@ -192,7 +192,7 @@ matrix_analytics_events = "com.github.matrix-org:matrix-analytics-events:0.23.1"
 
 # Emojibase
 matrix_emojibase_bindings = "io.element.android:emojibase-bindings:1.1.3"
-sigpwned_emoji4j = "com.sigpwned:emoji4j-core:15.1.0"
+sigpwned_emoji4j = "com.sigpwned:emoji4j-core:15.1.2"
 
 # Di
 inject = "javax.inject:javax.inject:1"