Update com.tickaroo.tikxml to v0.8.15

Author: renovate[bot]

gradle/libs.versions.toml

@@ -22,7 +22,7 @@ threetenbp = "1.6.0"
 spotless = "6.8.0"
 androidx-fragment = "1.4.0"
 gradleDependencyUpdate = "0.42.0"
-com-tickaroo-tikxml = "0.8.13"
+com-tickaroo-tikxml = "0.8.15"
 agp = "7.3.0"
 
 [plugins]