Update testcontainers-java monorepo to v1.20.4 (#8591)

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

Author: renovate[bot]

gradle/libs.versions.toml

@@ -14,7 +14,7 @@ org-jetbrains-coroutines = "1.8.1"
 org-jetbrains-kotlin = "1.9.25"
 org-junit-jupiter = "5.11.3"
 retrofit = "2.11.0"
-testcontainers = "1.20.1"
+testcontainers = "1.20.4"
 
 [libraries]
 amazonCorretto = "software.amazon.cryptools:AmazonCorrettoCryptoProvider:2.4.1"