Disable an InvalidLink test for a javadoc bug on JDK >= 26

PiperOrigin-RevId: 835901923

Author: cushon

core/src/test/java/com/google/errorprone/bugpatterns/javadoc/InvalidLinkTest.java

@@ -231,6 +231,7 @@ static void foo(int bar) {}
   // https://bugs.openjdk.org/browse/JDK-8371248
   @Test
   public void crash() {
+    assume().that(Runtime.version().feature()).isLessThan(26);
     helper
         .addSourceLines(
             "Test.java",