Update links to point to smithy.io (smithy-lang#637)

Author: JordonPhillips

README.md

@@ -94,7 +94,7 @@ are as follows:
 
 7. The generated client can be found in `build/smithyprojections/foo-client/source/typescript-codegen`.
 
-See [the Smithy documentation](https://awslabs.github.io/smithy/guides/building-models/gradle-plugin.html)
+See [the Smithy documentation](https://smithy.io/2.0/guides/building-models/gradle-plugin.html)
 for more information on build Smithy projects with Gradle.
 
 ## TypeScript code generation

smithy-typescript-codegen/src/main/java/software/amazon/smithy/typescript/codegen/StructuredMemberWriter.java

@@ -290,7 +290,7 @@ private String getSanitizedMemberName(MemberShape member) {
      * @param member The member being generated for.
      * @return If the interface member should be treated as required.
      *
-     * @see <a href="https://awslabs.github.io/smithy/spec/core.html#idempotencytoken-trait">Smithy idempotencyToken trait.</a>
+     * @see <a href="https://smithy.io/2.0/spec/behavior-traits.html#idempotencytoken-trait">Smithy idempotencyToken trait.</a>
      */
     private boolean isRequiredMember(MemberShape member) {
         return member.isRequired() && !member.hasTrait(IdempotencyTokenTrait.class);

smithy-typescript-codegen/src/main/java/software/amazon/smithy/typescript/codegen/integration/HttpBindingProtocolGenerator.java

@@ -815,7 +815,7 @@ private boolean writeRequestQueryString(
                 }
                 // Handle any additional query params bindings.
                 // If query string parameter is also present in httpQuery, it would be overwritten.
-                // Serializing HTTP messages https://awslabs.github.io/smithy/1.0/spec/core/http-traits.html#serializing-http-messages
+                // Serializing HTTP messages https://smithy.io/2.0/spec/http-bindings.html#serializing-http-messages
                 if (!queryParamsBindings.isEmpty()) {
                     SymbolProvider symbolProvider = context.getSymbolProvider();
                     String memberName = symbolProvider.toMemberName(queryParamsBindings.get(0).getMember());