Fix generics in EppXmlTransformer.unmarshal to not be only on the return type.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=124914271

java/google/registry/tools/GenerateApplicationsReportCommand.java

@@ -138,7 +138,7 @@ final class GenerateApplicationsReportCommand implements RemoteApiCommand, Gtech
 
       SignedMark signedMark;
       try {
-        signedMark = unmarshal(signedMarkData);
+        signedMark = unmarshal(SignedMark.class, signedMarkData);
       } catch (EppException e) {
         return Optional.of(makeLine(domainApplication, "Unparseable SMD"));
       }