Update wasm-spec.

Rolling v8/test/wasm-js/data: https://chromium.googlesource.com/external/github.com/WebAssembly/spec/+log/263af5a..bc7d300

[test] More LEB128 tests (#1019) (Wanming Lin)
https://chromium.googlesource.com/external/github.com/WebAssembly/spec/+/bc7d300

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

Change-Id: Ia3ba9ade2fec0c5483cf912e77636e11424ea66b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1617004Reviewed-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@{#61594}

DEPS

@@ -236,7 +236,7 @@ deps = {
     'dep_type': 'cipd',
   },
   'v8/test/wasm-js/data':
-    Var('chromium_url') + '/external/github.com/WebAssembly/spec.git' + '@' + '263af5ad374c66d1d09544bb05c5d6038f095b0e',
+    Var('chromium_url') + '/external/github.com/WebAssembly/spec.git' + '@' + 'bc7d3006bbda0de5031c2a1b9266a62fa7895019',
   'v8/third_party/perfetto':
     Var('android_url') + '/platform/external/perfetto.git' + '@' + '10c98fe0cfae669f71610d97e9da94260a6da173',
   'v8/third_party/protobuf':