revert to JUnit 5.10.5 for CI debugging

Author: ianbotsf

gradle/libs.versions.toml

@@ -20,7 +20,7 @@ smithy-version = "1.60.2"
 
 # testing
 ddb-local-version = "2.5.2"
-junit-version = "5.13.2"
+junit-version = "5.10.5"
 kotest-version = "5.9.1"
 kotlinx-benchmark-version = "0.4.12"
 kotlinx-serialization-version = "1.7.3"