Update wasm-spec.

Rolling v8/test/wasm-js/data: https://chromium.googlesource.com/external/github.com/WebAssembly/spec/+log/022589c..263af5a

[spec] Replace URLs with bikeshed biblio refs (#1018) (Ben Smith)
https://chromium.googlesource.com/external/github.com/WebAssembly/spec/+/263af5a

+ Security and Privacy Considerations on Core and JS-API (#1015) (Eric Prud'hommeaux)
https://chromium.googlesource.com/external/github.com/WebAssembly/spec/+/5baa425

[spec] Fix ToC of Appendix in w3c version (#1017) (Ben Smith)
https://chromium.googlesource.com/external/github.com/WebAssembly/spec/+/74dd66b

TBR=ahaas@chromium.org,clemensh@chromium.org

Change-Id: I4336ff78d519d7af026198b27117635b097ce3c7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1612782Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#61500}

DEPS

@@ -236,7 +236,7 @@ deps = {
     'dep_type': 'cipd',
   },
   'v8/test/wasm-js/data':
-    Var('chromium_url') + '/external/github.com/WebAssembly/spec.git' + '@' + '022589ce60f671fc16ffbd4ff05c20447d718ce6',
+    Var('chromium_url') + '/external/github.com/WebAssembly/spec.git' + '@' + '263af5ad374c66d1d09544bb05c5d6038f095b0e',
   'v8/third_party/perfetto':
     Var('android_url') + '/platform/external/perfetto.git' + '@' + '70fed1d420d31510e29aae328cbb3aa3f0a80e25',
   'v8/third_party/protobuf':