Fix typo in comment

Author: alpar-t

buildSrc/build.gradle

@@ -181,7 +181,7 @@ if (project != rootProject) {
   test {
     include "**/*Tests.class"
     exclude "**/*IT.class"
-    // The test task is configured to runtimeJava version, but we build-tools doesn't support all of them, so test
+    // The test task is configured to runtimeJava version, but build-tools doesn't support all of them, so test
     // with compiler instead on the ones that are too old.
     if (project.runtimeJavaVersion <= JavaVersion.VERSION_1_10) {
       jvm = "${project.compilerJavaHome}/bin/java"