Update dependabot.yml to ignore Kotlin dependencies

Author: samhill303

.github/dependabot.yml

@@ -6,6 +6,9 @@ updates:
       interval: "weekly"
       day: monday
     labels: ["dependencies"]
+    ignore:
+     - dependency-name: "org.jetbrains.kotlin.*"
+     - dependency-name: "kotlin-test"
     groups:
       minor:
         applies-to: version-updates