Update wasm-spec.

Rolling v8/test/wasm-js/data: https://chromium.googlesource.com/external/github.com/WebAssembly/spec/+log/b0c936c..a221f25

[spec] Upgrade to IEEE 754-2019 (#1050) (Andreas Rossberg)
https://chromium.googlesource.com/external/github.com/WebAssembly/spec/+/a221f25

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

Change-Id: Id90c6e3228c4e5943e8bb49bc82fd4a9b01c424f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1726578Reviewed-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@{#63001}

DEPS

@@ -231,7 +231,7 @@ deps = {
     'dep_type': 'cipd',
   },
   'v8/test/wasm-js/data':
-    Var('chromium_url') + '/external/github.com/WebAssembly/spec.git' + '@' + 'b0c936c6eda6103b12c8d781828aa2d494b5fe40',
+    Var('chromium_url') + '/external/github.com/WebAssembly/spec.git' + '@' + 'a221f2574d7106e92cf8abaf05d5bb1131b19d76',
   'v8/third_party/perfetto':
     Var('android_url') + '/platform/external/perfetto.git' + '@' + '0e8281399fd854de13461f2c1c9f2fb0b8e9c3ae',
   'v8/third_party/protobuf':