Update cross version tests (#110)

Author: britter

build.gradle.kts

@@ -33,7 +33,7 @@ pluginPublishConventions {
 
 testing.suites.named<JvmTestSuite>("test") {
     useJUnitJupiter()
-    listOf("7.4", "7.6.4", "8.0.2").forEach { gradleVersionUnderTest ->
+    listOf("7.4", "7.6.5", "8.0.2").forEach { gradleVersionUnderTest ->
         targets.register("test${gradleVersionUnderTest}") {
             testTask {
                 group = LifecycleBasePlugin.VERIFICATION_GROUP