Update links to point to smithy.io

Author: JordonPhillips

codegen/smithy-aws-go-codegen/src/main/java/software/amazon/smithy/aws/go/codegen/RestJsonProtocolGenerator.java

@@ -64,7 +64,7 @@
  * It handles reading and writing from document bodies, including generating any
  * functions needed for performing serde.
  *
- * @see <a href="https://awslabs.github.io/smithy/spec/http.html">Smithy HTTP protocol bindings.</a>
+ * @see <a href="https://smithy.io/2.0/spec/http-bindings.html">Smithy HTTP protocol bindings.</a>
  */
 abstract class RestJsonProtocolGenerator extends HttpBindingProtocolGenerator {
  private final Set<ShapeId> generatedDocumentBodyShapeSerializers = new HashSet<>();

codegen/smithy-aws-go-codegen/src/main/java/software/amazon/smithy/aws/go/codegen/XmlProtocolUtils.java

@@ -349,7 +349,7 @@ public static void handleDecodeError(GoWriter writer, String returnExtras) {
  * This method is used indirectly by generateErrorDispatcher to generate operation specific error handling functions
  *
  * @param context the generation context
- * @see <a href="https://awslabs.github.io/smithy/1.0/spec/aws/aws-restxml-protocol.html#operation-error-serialization">Rest-XML operation error serialization.</a>
+ * @see <a href="https://smithy.io/2.0/aws/protocols/aws-restxml-protocol.html#error-response-serialization">Rest-XML operation error serialization.</a>
  */
  public static void writeXmlErrorMessageCodeDeserializer(ProtocolGenerator.GenerationContext context) {
  GoWriter writer = context.getWriter().get();