Fix a comment nit (can't @link to a generic type)

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=147731422

javatests/google/registry/rde/imports/RdeDomainReaderTest.java

@@ -197,7 +197,7 @@ public class RdeDomainReaderTest {
     }
   }
 
-  /** Creates a deep copy of the {@link T} */
+  /** Creates a deep copy of the {@code T} */
   public <T> T cloneObject(
       T object) throws Exception {
     ByteArrayOutputStream bout = new ByteArrayOutputStream();