fix(deps): update dependency com.google.adk:google-adk to v0.8.0

Author: renovate[bot]

gradle/libs.versions.toml

@@ -9,7 +9,7 @@ detekt = "2.0.0-alpha.2"
 dokka = "2.1.0"
 finchly = "0.1.1"
 google-genai = "1.41.0"
-google-adk = "0.7.0"
+google-adk = "0.8.0"
 junit = "6.0.3"
 kotest = "5.9.1"
 kotlin = "2.2.21"